Humidity and Temperature

1% Accuracy (dewpoint output optional)
HMT331 – wall mount
HMT333 – remote mount (for indoor or outdoor use)
HMT335– high temperature
HMT338– high pressure (up to 580 psi)

Intrinsically safe:
HMT361 – wall mount
HMT363 – remote mount (for indoor or outdoor use)
HMT365 – high temperature
HMT368 – high pressure (up to 580 psi)

2% Accuracy
HMD60 – duct mount, 4-20 mA output
HMD70 – duct mount, voltage output
HMD60YO/UO – outdoor, 4-20 mA output
HMD70YO/UO - outdoor, voltage output
HMW60 – wall mount, 4-20 mA output
HMW70 – wall mount, voltage output
HMT100 – wall or remote mount, 4-20 mA or voltage output, optional dewpoint output

3% Accuracy
HMD40 - duct mount, 4-20 mA output
HMD50 - duct mount, voltage output
HMW40 - wall mount, 4-20 mA output
HMW50 - wall mount, voltage output

Carbon Dioxide

GMD20 – duct mount, optional display and relay
GMW21 – wall mount, optional display and relay
GMW115 – wall mount
GMP343 – outdoor

Vaisala HUMICAP® Humidity and Temperature Transmitter HMT331

Wall mounted transmitter shall incorporate a thin film polymer capacitive humidity sensor that is field replaceable and have N.I.S.T. traceable accuracy of +/- 1% RH (0…90% RH) and +/- 1.7% RH (90…100% RH).  Sensor shall have a 90% response time in 20 seconds, and have a stability of better than +/- 1% RH/Year. Temperature sensor shall be a platinum 100 RTD with a N.I.S.T. traceable accuracy of +/-0.2°C (0.36°F) at 20°C (68°F). Electronics to be protected in a NEMA-4 fully gasketed enclosure.  Transmitter to be powered by 10…35 VDC, 24 VAC or optional 100…240 VAC and provide two linear selectable analog outputs of: 4 to 20 mA, 0 to 20 mA, 0 to 1 V, 0 to 5 V, or 0 to 10 V, as well as serial output of standard RS232C (or optional RS 485/422).  These outputs shall have the ability to scale both the measurement parameter and output signal. Transmitter shall also have the option for a third analog output.  Transmitter shall operate over the 0 to 100% RH range and -40° to 60°C (-40° to 140°F) temperature range. Transmitter shall be microprocessor based giving the option to calculate and directly output dewpoint, absolute humidity, wet bulb temperature and mixing ratio. Transmitter shall also have the option of incorporating a local graphical/numerical display in its cover, and be able to display units in either English or metric units. Transmitter shall be able to be calibrated, without disturbing operation, using a single point electronic transfer standard.

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMT333

Duct/remote mounted transmitter shall incorporate a thin film polymer capacitive humidity sensor that is field replaceable and have N.I.S.T. traceable accuracy of +/- 1% RH (0…90% RH) and +/- 1.7% RH (90…100% RH).  Sensor shall have a 90% response time in 20 seconds, and have a stability of better than +/- 1% RH/Year. Temperature sensor shall be a platinum 100 RTD with a N.I.S.T. traceable accuracy of +/- 0.2°C (0.36°F) at 20°C (68°F). Electronics to be protected in a NEMA-4 fully gasketed enclosure.  Transmitter to be powered by 10…35 VDC, 24 VAC or optional 100…240 VAC and provide two linear selectable analog outputs of: 4 to 20 mA, 0 to 20 mA, 0 to 1 V, 0 to 5 V, or 0 to 10 V, as well as serial output of standard RS232C (or optional RS 485/422).  These outputs shall have the ability to scale both the measurement parameter and output signal. Transmitter shall also have the option for a third analog output.  Remote probe shall have a measurement range of -40°C to 80°C (-40° to 176°F), or optional -40° to 120°C (-40° to 248°F).  Standard cable length to be 2 meters (optional 5 or 10 meters). Transmitter shall be microprocessor based giving the option to calculate and directly output dewpoint, absolute humidity, wet bulb temperature and mixing ratio. Transmitter shall also have the option of incorporating a local graphical/numerical display in its cover, and be able to display units in either English or metric units. Transmitter shall be able to be calibrated, without disturbing operation, using a single point electronic transfer standard.

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMT335

Remote mounted transmitter shall incorporate a thin film polymer capacitive humidity sensor that is field replaceable and have N.I.S.T. traceable accuracy of +/- 1% RH (0…90% RH) and +/- 1.7% RH (90…100% RH).  Sensor shall have a 90% response time in 20 seconds, and have a stability of better than +/- 1% RH/Year. Temperature sensor shall be a platinum 100 RTD with a N.I.S.T. traceable accuracy of +/-0.2°C (0.36°F) at 20°C (68°F).  Electronics to be protected in a NEMA-4 fully gasketed enclosure.  Transmitter to be powered by 10…35 VDC, 24 VAC or optional 100…240 VAC and provide two linear selectable analog outputs of: 4 to 20 mA, 0 to 20 mA, 0 to 1 V, 0 to 5 V, or 0 to 10 V, as well as serial output of standard RS232C(or optional RS 485/422).  These outputs shall have the ability to scale both the measurement parameter and output signal. Transmitter shall also have the option for a third analog output.  Remote probe shall have a measurement range of -70° to 180°C (-94° to 356°F), standard cable length to be 2 meters (optional 5 or 10 meters). Transmitter shall be microprocessor based giving the option to calculate and directly output dewpoint, absolute humidity, wet bulb temperature and mixing ratio. Transmitter shall also have the option of incorporating a local graphical/numerical display in its cover, and be able to display units in either English or metric units. Transmitter shall be able to be calibrated, without disturbing operation, using a single point electronic transfer standard.

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMT338

Remote mounted transmitter shall incorporate a thin film polymer capacitive humidity sensor that is field replaceable and have N.I.S.T. traceable accuracy of +/- 1% RH (0…90% RH) and +/- 1.7% RH (90…100% RH).  Sensor shall have a 90% response time in 20 seconds, and have a stability of better than +/- 1% RH/Year. Temperature sensor shall be a platinum 100 RTD with a N.I.S.T. traceable accuracy of +/-0.2°C (0.36°F) at 20°C (68°F).  Electronics to be protected in a NEMA-4 fully gasketed enclosure.  Transmitter to be powered by 10…35 VDC, 24 VAC or optional 100…240 VAC and provide two linear selectable analog outputs of: 4 to 20 mA, 0 to 20 mA, 0 to 1 V, 0 to 5 V, or 0 to 10 V, as well as serial output of standard RS232C(or optional RS 485/422).  These outputs shall have the ability to scale both the measurement parameter and output signal. Transmitter shall also have the option for a third analog output.  Remote probe shall have: a measurement range of -70° to 180°C (-94° to 356°F), standard cable length to be 2 meters (optional 5 or 10 meters), and pressure rating of 4 MPa (580 psi). Transmitter shall be microprocessor based giving the option to calculate and directly output dewpoint, absolute, wet bulb temperature and mixing ratio. Transmitter shall also have the option of incorporating a local graphical/numerical display in its cover, and be able to display units in either English or metric units. Transmitter shall be able to be calibrated, without disturbing operation, using a single point electronic transfer standard.

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Vaisala HUMICAP® Intrinsically Safe Humidity and Temperature Transmitter HMT361

Wall mounted intrinsically safe transmitter shall incorporate a thin film polymer capacitive humidity sensor that is field replaceable and have NIST traceable accuracy of +/- 1% RH (0…90% RH) and +/- 2% RH (90…100% RH).  Sensor shall have a 90% response time in 20 seconds, and have a stability of better than +/- 1% RH/Year. Temperature sensor shall be a platinum 1000 RTD with a NIST traceable accuracy of +/-0.2°C (0.36°F) at 20°C (68°F).  Electronics to be protected in a NEMA-4 enclosure and approved by FM for Classes I,II,III, Div 1, Groups A-G and Div 2, Groups A-D,F, and G.  Also CSA approved for Class I, Div 1 and 2, Groups A,B,C,D; Class II, Div 1 and 2, Groups G and Coal Dust; and Class III.  Transmitter to be powered by 12…28 VDC and provide two 4 to 20 mA analog outputs.  Transmitter shall operate over the 0 to 100% RH range and -40° to 60°C (-40° to 140°F) temperature range. Transmitter shall be microprocessor based giving the option to calculate and directly output dewpoint, absolute humidity, wet bulb temperature and mixing ratio.  Transmitter shall also have the option of incorporating a local display in its cover, and be able to display units in either English or metric units. Probes shall be interchangeable for minimal downtime.

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Vaisala HUMICAP® Intrinsically Safe Humidity and Temperature Transmitter HMT363

Duct/Remote mounted intrinsically safe transmitter shall incorporate a thin film polymer capacitive humidity sensor that is field replaceable and have NIST traceable accuracy of +/- 1% RH (0…90% RH) and +/- 2% RH (90…100% RH).  Sensor shall have a 90% response time in 20 seconds, and have a stability of better than +/- 1% RH/Year. Temperature sensor shall be a platinum 1000 RTD with a NIST traceable accuracy of +/-0.2°C (0.36°F) at 20°C (68°F).  Electronics to be protected in a NEMA-4 enclosure and approved by FM for Classes I,II,III, Div 1, Groups A-G and Div 2, Groups A-D,F, and G.  Also CSA approved for Class I, Div 1 and 2, Groups A,B,C,D; Class II, Div 1 and 2, Groups G and Coal Dust; and Class III.  Transmitter to be powered by 12…28 VDC and provide two 4 to 20 mA analog outputs.  Transmitter shall operate over the 0 to 100% RH range.  Remote probe shall have a measurement range of -40° to 120°C (-40° to 248°F) and standard cable length to be 2 meters (optional 5 or 10 meters).  Transmitter shall be microprocessor based giving the option to calculate and directly output dewpoint, absolute humidity, wet bulb temperature and mixing ratio.  Transmitter shall also have the option of incorporating a local display in its cover, and be able to display units in either English or metric units.   Probes shall be interchangeable for minimal downtime. 

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Vaisala HUMICAP® Intrinsically Safe Humidity and Temperature Transmitter HMT365

Remote mounted intrinsically safe transmitter shall incorporate a thin film polymer capacitive humidity sensor that is field replaceable and have NIST traceable accuracy of +/- 1% RH (0…90% RH) and +/- 2% RH (90…100% RH).  Sensor shall have a 90% response time in 20 seconds, and have a stability of better than +/- 1% RH/Year. Temperature sensor shall be a platinum 1000 RTD with a NIST traceable accuracy of +/-0.2°C (0.36°F) at 20°C (68°F).  Electronics to be protected in a NEMA-4 enclosure and approved by FM for Classes I,II,III, Div 1, Groups A-G and Div 2, Groups A-D,F, and G.  Also CSA approved for Class I, Div 1 and 2, Groups A,B,C,D; Class II, Div 1 and 2, Groups G and Coal Dust; and Class III.  Transmitter to be powered by 12…28 VDC and provide two 4 to 20 mA analog outputs.  Transmitter shall operate over the 0 to 100% RH range. Remote probe shall have a measurement range of -40° to 180°C (-40° to 356°F) and standard cable length to be 2 meters (optional 5 or 10 meters).  Transmitter shall be microprocessor based giving the option to calculate and directly output dewpoint, absolute humidity, wet bulb temperature and mixing ratio. Transmitter shall also have the option of incorporating a local display in its cover, and be able to display units in either English or metric units. Probes shall be interchangeable for minimal downtime. 

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Vaisala HUMICAP® Intrinsically Safe Humidity and Temperature Transmitter HMT368

Remote mounted intrinsically safe transmitter shall incorporate a thin film polymer capacitive humidity sensor that is field replaceable and have NIST traceable accuracy of +/- 1% RH (0…90% RH) and +/- 2% RH (90…100% RH).  Sensor shall have a 90% response time in 20 seconds, and have a stability of better than +/- 1% RH/Year. Temperature sensor shall be a platinum 1000 RTD with a NIST traceable accuracy of +/-0.2°C (0.36°F) at 20°C (68°F).  Electronics to be protected in a NEMA-4 enclosure and approved by FM for Classes I,II,III, Div 1, Groups A-G and Div 2, Groups A-D,F, and G.  Also CSA approved for Class I, Div 1 and 2, Groups A,B,C,D; Class II, Div 1 and 2, Groups G and Coal Dust; and Class III.  Transmitter to be powered by 12…28 VDC and provide two 4 to 20 mA analog outputs.  Transmitter shall operate over the 0 to 100% RH range. Remote probe shall have a measurement range of -40° to 180°C (-40° to 356°F), standard cable length to be 2 meters (optional 5 or 10 meters), and pressure rating of 4 MPa (580 psi). Transmitter shall be microprocessor based giving the option to calculate and directly output dewpoint, absolute humidity, wet bulb temperature and mixing ratio.  Transmitter shall also have the option of incorporating a local display in its cover, and be able to display units in either English or metric units.  Probes shall be interchangeable for minimal downtime. 

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMD60

Duct mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor that is field replaceable. Electronics to be protected in a NEMA4 fully gasketed enclosure. Accuracy to be NIST traceable ± 2% RH for the 0 to 90% RH range, and ± 3% RH for the 90 to 100% RH at 20°C (68°F). Temperature dependence effects of the sensor shall not add more than 0.8% RH additional error at the maximum and minimum operating temperatures.  Sensor shall have a 90% response time in 15 seconds and a stability of better than 1% RH/Year. Transmitter to be loop powered by 10 to 35 VDC (RL = 0) or 20 to 35 VDC (RL = 500), provide a linear output signal of 4 to 20 mA corresponding to 0 to 100% RH.  Temperature sensor to be a platinum 1000 RTD having a linear output signal of 4 to 20 mA corresponding to -20° to 80°C (-4°  to 176°F). Accuracy to be NIST traceable  ± 0.2°C (0.36°F) at 20°C (68°F). Transmitter shall have the ability to calibrate relative humidity, without disturbing operation, using a single point electronic field calibrator.

Vaisala Model: HMD60Y (Relative Humidity and Temperature)

Vaisala Model: HMD60U (Relative Humidity only)

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMD70

Duct mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor that is field replaceable. Electronics to be protected in a NEMA-4 fully gasketed enclosure. Accuracy to be NIST traceable ± 2% RH for the 0 to 90% RH range, and ± 3% RH for the 90 to 100% RH range at 20°C (68°F). Temperature dependence effects of the sensor shall not add more than 0.8% RH additional error at the maximum and minimum operating temperatures. Sensor shall have a 90% response time in 15 seconds and a stability of better than 1% RH/Year. Transmitter to be powered by 19 to 35 VDC or 16 to 24 VAC,  provides a linear output signal of jumper selectable; 0 to 1, 0 to 5, 0 to 10 VDC or 0 to 20 mA, corresponding to 0 to 100% RH. Temperature sensor to be a platinum 1000 RTD having a linear output signal of  jumper selectable; 0 to 1, 0 to 5, 0 to 10 VDC or 0 to 20 mA, corresponding to -20° to 80°C (-4° to 176°F). Accuracy to be NIST traceable ± 0.2°C (0.36°F) at 20°C (68°F). Transmitter shall have the ability to calibrate relative humidity, without disturbing operation, using a single point electronic field calibrator.

Vaisala Model: HMD70Y (Relative Humidity and Temperature)

Vaisala Model: HMD70U (Relative Humidity only)

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Vaisala HUMICAP® Outdoor Humidity and Temperature Transmitter HMD60YO / UO

Outdoor mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor that is field replaceable. Electronics to be protected in a NEMA-4 fully gasketed enclosure. Transmitter probe shall be mounted in a naturally aspirated solar radiation and precipitation shield. Accuracy to be ± 2% RH for the 0…90% RH range, and ±3% RH for the 90 to 100% RH range at 20°C (68°F). Sensor shall have a 90% response time in 15 seconds and a stability of better than 1% RH/Year. Transmitter to be loop powered by 10 to 35 VDC (RL = 0 ) or 20 to 35 VDC (RL = 500 ), provide a linear output signal of 4 to 20 mA corresponding to 0…100% RH. Temperature sensor to be a platinum 1000 RTD having a linear output signal of 4 to 20 mA corresponding to -40° to 60°C (-40° to 140°F).  Temperature accuracy to be ±0.2°C (0.36°F) at 20°C (68°F). Transmitter shall have the ability to calibrate relative humidity, without disturbing operation, using a single point electronic field calibrator.

Vaisala Model: HMD60YO (Relative Humidity and Temperature)

Vaisala Model: HMD60UO (Relative Humidity only)

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Vaisala HUMICAP® Outdoor Humidity and Temperature Transmitter HMD70YO / UO

Outdoor mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor that is field replaceable. Electronics to be protected in a NEMA-4 fully gasketed enclosure. Transmitter probe shall be mounted in a naturally aspirated solar radiation and precipitation shield. Accuracy to be ± 2% RH for the 0…90% RH range, and ±3% RH for the 90 to 100% RH range at 20°C (68°F). Sensor shall have a 90% response time in 15 seconds and a stability of better than 1% RH/Year.  Transmitter to be powered by 10 to 35 VDC (RL = 0 ) or 20 to 35 VDC (RL = 500 ), provide a jumper selectable linear output signal of 0..1, 0..5, or 0..10 V corresponding to 0…100% RH. Temperature sensor to be a platinum 1000 RTD having a jumper selectable linear output signal of 0..1, 0..5, or 0..10 V corresponding to -40° to 60°C (-40° to 140°F). Temperature accuracy to be ±0.2°C (0.36°F) at 20°C (68°F).  Transmitter shall have the ability to calibrate relative humidity, without disturbing operation, using a single point electronic field calibrator.

Vaisala Model: HMD70YO (Relative Humidity and Temperature)

Vaisala Model: HMD70UO (Relative Humidity only)

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMW60

Wall mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor that is field replaceable. Accuracy to be NIST traceable ± 2% RH for the 0 to 90% RH range, and ± 3% RH for the 90 to 100% RH at 20°C (68°F). Temperature dependence effects of the sensor shall not add more than 0.8% RH additional error at the maximum and minimum operating temperatures. Sensor shall have a 90% response time in 15 seconds and a stability of better than 1% RH/Year. Transmitter to be loop powered by 10 to 35 VDC (R_L = 0) or 20 to 35 VDC (R_L = 500), provide a linear output signal of 4 to 20 mA corresponding to 0 to 100% RH.  Temperature sensor to be a platinum 1000 RTD having a linear output signal of 4 to 20 mA corresponding to -5° to 55°C (23° to 131°F). Accuracy to be ±0.2°C (0.36°F) at 20°C (68°F). Transmitter shall have the ability to calibrate relative humidity, without disturbing operation, using a single point electronic field calibrator.

Vaisala Model: HMW60Y (Relative Humidity and Temperature)

Vaisala Model: HMW60U (Relative Humidity only)

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMW70

Wall mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor that is field replaceable. Accuracy to be NIST traceable ± 2% RH for the 0 to 90% RH range, and ± 3% RH for the 90…95% RH range at 20°C (68°F).  Temperature dependence effects of the sensor shall not add more than 0.8% RH additional error at the maximum and minimum operating temperatures.  Sensor shall have a 90% response time in 15 seconds and a stability of better than 1% RH/Year. Transmitter to be powered by 19 to 35 VDC or 16 to 24 VAC, provide a linear output signal of jumper selectable; 0 to 1, 0 to 5, 0 to 10 VDC or 0 to 20 mA, corresponding to 0 to 100% RH. Temperature sensor to be a platinum 1000 RTD having a linear output signal of  jumper selectable; 0 to 1, 0 to 5, 0 to 10 VDC or 0 to 20 mA, corresponding to -5° to 55°C (23° to 131°F). Accuracy to be NIST traceable ±0.2°C (0.36°F) at 20°C (68°F). Transmitter shall have the ability to calibrate relative humidity, without disturbing operation, using a single point electronic field calibrator.

Vaisala Model: HMW70Y (Relative Humidity and Temperature)

Vaisala Model: HMW70U (Relative Humidity only)

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMT100

Wall or remote mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor that is field replaceable. Electronics shall be protected from: condensation, chemicals and dust in a fully gasketed NEMA-4 enclosure. Sensors to be able to withstand wash down with no lasting detrimental effect to transmitter performance. Accuracy to be NIST traceable ± 1.7% RH at 20°C (68°F) for the 0 to 90% RH range, and ± 2.5% RH for the 90 to 100% RH range.  Sensor shall have a 90% response time in 15 seconds and a stability of better than 1% RH/Year. Transmitter will be powered by optional loop power 10 to 35 VDC (RL = 0) or 20 to 35 VDC (RL = 500), or three-wire voltage 10 to 35VDC/24 VAC.  Transmitter shall have a linear selectable output signal of 4 to 20 mA, 0 to 1V, 0 to 5V or 0 to 10V corresponding to 0 to 100% RH or -20° to 80°C (-4° to +176°F) dewpoint.  Optional temperature sensor to be a platinum 1000 RTD having a linear selectable output signal of 4 to 20 mA, 0 to 1V, 0 to 5V or 0 to 10V corresponding to -40° to 60°C (-40° to +140°F) for fixed probe and -40° to 80°C (-40° to +176°F) for remote probe. Accuracy to be NIST traceable ±0.2°C (0.36°F) at 20°C (68°F).  Probes shall be interchangeable for minimal maintenance downtime.  Transmitter shall have the ability to calibrate relative humidity, without disturbing operation, using a single point electronic field calibrator. 

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMD40

Duct mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor.  Sensor to be interchangeable in the field and calibration free. Initial accuracy to be ±3% RH between 10 and 90% RH at 20°C (68°F) with a temperature dependence <±1.5% throughout the temperature measuring range. Sensor to have a stability of ±2% RH over a two year period, and a 90% response time in 15 seconds. Transmitter shall operate over a humidity range of 0…100%. Transmitter to be loop powered by 10… 28 VDC and provide a linear output signal of 4…20 mA corresponding to 0 to 100% RH. Temperature sensor shall be a platinum 1000 RTD with a linear output of 4…20 mA corresponding to -40° to 60°C (-40°to 140°F) with an accuracy of ±0.3°C (0.54° F) at 25°C (77°F).

Vaisala Model: HMD40Y (Relative Humidity and Temperature)

Vaisala Model: HMD40U (Relative Humidity only)

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMD50

Duct mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor. Sensor to be interchangeable in the field and calibration free. Initial accuracy to be ±3% RH between 10 and 90% RH at 20°C (68°F) with a temperature dependence <±2% throughout the temperature measuring range. Sensor to have a stability of ±2% RH over a two year period, and a 90% response time in 15 seconds. Transmitter shall operate over a humidity range of 0…100% RH.  Transmitter to be powered by 12 to 35 VDC/12 to 24 VAC, consume not more than 6 mA, and provide a linear output signal of 0 to 1 V corresponding to 0 to 100% RH or be powered by 15 to 35 VDC/15 to 35 VAC, consume not more than 6 mA, and provide a linear output signal of 0 to 10 V corresponding to 0 to 100% RH. Temperature sensor shall be a platinum 1000 RTD with a linear output of 0 to 1 V or 0 to 10 V corresponding to -40° to 60°C (-40° to 140° F) with an accuracy of ± 0.3°C (0.54°F) at 25°C (77°F).

Vaisala Model: HMD50Y (Relative Humidity and Temperature)

Vaisala Model: HMD50U (Relative Humidity only)

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Vaisala HUMICAP® Humidity and Temperature Transmitter HMW40

Wall mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor. Sensor to be interchangeable in the field and calibration free. Initial accuracy to be ±3% RH between 10 and 90% RH at 20°C (68° F) with a temperature dependence <±1.5% throughout the temperature measuring range. Sensor to have a stability of ±2% RH over a two year period, and a 90% response time in 15 seconds. Transmitter shall operate over a humidity range of 0…90% RH. Transmitter to be loop powered by 10…28 VDC and provide a linear output signal of 4…20 mA corresponding to 0 to 100% RH. Temperature sensor shall be a platinum 1000 RTD with a linear output of 4…20 mA corresponding to -5° to 55°C (23° to 131° F) with an accuracy of ±0.3°C (0.54° F) at 25°C ( 77° F).

Vaisala Model: HMW40Y (Relative Humidity and Temperature)

Vaisala Model: HMW40U (Relative Humidity only)

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Vaisala HUMICAP® Humidity and Temperature HMW50

Wall mounted transmitter shall incorporate a thin film polymer capacitive relative humidity sensor. Sensor to be interchangeable in the field and calibration free. Initial accuracy to be ±3% RH between 10 and 90% RH at 20°C (68° F) with a temperature dependence <±1.5% throughout the temperature measuring range. Sensor to have a stability of ±2% RH over a two year period, and a 90% response time in 15 seconds. Transmitter shall operate over a humidity range of 0…90% RH and a temperature range of -5° to 55°C (+23° to +131° F). Transmitter to be powered by 12 to 35 VDC or 12 to 24 VAC, consume not more than 6 mA, and provide a linear output signal of 0 to 1 V corresponding to 0…100% RH or be powered by 15 to 35 VDC or 15 to 35 VAC, consume not more than 6 mA, and provide a linear output signal of 0 to 10 V corresponding to 0 to 100% RH.  Temperature sensor shall be a platinum 1000 RTD with a linear output of 0 to 1 V or 0 to 10 V corresponding to -5° to 55°C (23° to 131°F) with an accuracy of ±0.3°C ( ±0.54°F) at 25°C.

Vaisala Model: HMW50Y (Relative Humidity and Temperature)

Vaisala Model: HMW50U (Relative Humidity only)

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Vaisala CARBOCAP® Carbon Dioxide Transmitter GMD20

Duct mount transmitter shall incorporate a silicon-based CARBOCAP® NDIR sensor.  Transmitter should not require a separate aspiration assembly, sensor should be in duct when installed. Accuracy at 25°C (77°F) shall be <±(30 ppm + 2% of reading).  Measurement range of 0…2000 ppm for 0 to 100% RH (non-condensing) and -5 to 45°C (23 to 113°F).  Can be calibrated for other ranges: 0-5000 ppm, 0-10,000 ppm, 0-20,000 ppm.  Temperature coefficient no larger than 0.15%FS/°C. Analog outputs must be jumper selectable: 0-20 mA, 4-20 mA, or 0-10V.  Power supply must be 24 VDC/VAC.  Long term stability shall be <+100 ppm/5yrs. Must be capable of calibration check in place using certified gases or a portable meter. Factory recommended calibration frequency of once per five (5) years.

Vaisala Model: GMD20

Vaisala Model: GMD20D (with display and relay)

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Vaisala CARBOCAP® Carbon Dioxide Transmitter GMW21

Carbon dioxide wall mount transmitter shall incorporate a silicon-based CARBOCAP® NDIR sensor. Accuracy at 25°C (77°F) <±(30 ppm + 2% of reading). Measurement range of 0…2000 PPM for 0 to 100% RH (non-condensing) and -5 to 45°C (+23 to 113°F). Can be calibrated for other ranges: 0-5000 ppm, 0-10,000 ppm, 0-20,000 ppm.  Temperature coefficient no larger than 0.15%FS/°C. Analog outputs must be jumper selectable: 0…20 mA, 4…20 mA, or 0…10V.  Power supply must be 24 VDC/VAC.  Long term stability shall be <+100 ppm/5yrs.  Must be capable of calibration check in place using certified gases or portable meter. Factory recommended calibration frequency of once per five (5) years.

Vaisala model: GMW21

Vaisala model: GMW21D (with display and relay)

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Vaisala CARBOCAP® Carbon Dioxide Transmitter GMW115

Carbon dioxide wall mount transmitter incorporates a silicon-based CARBOCAP® NDIR sensor. Accuracy at 25°C (77°F): <±(40 ppm + 3% of reading).  Measurement range of 0…2000 PPM for 0 to 100% RH (non-condensing) and -5 to 45°C (23 to 113°F). Temperature coefficient of no larger than 0.15%FS/°C. Analog outputs must be jumper selectable: 0…20 mA, 4…20 mA, or 0…10V.  Power supply must be 24 VDC/VAC.  Long term stability shall be <+100 PPM/5yrs. Must be capable of calibration check in place using certified gases or portable meter. Factory recommended calibration frequency of once per five (5) years.

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Vaisala CARBOCAP® Carbon Dioxide Probe GMP343

Carbon dioxide outdoor probe shall incorporate a silicon-based CARBOCAP® NDIR sensor. Accuracy at 25°C (77°F) and 370 ppm shall be <±(1.5% of reading). Measurement range of 0-1000 ppm, 0-2000, 0-3000, 0-4000 or 0-5000 ppm.  Operating humidity range is 0 to 100% RH and temperature range is -40 to 60°C (-40 to 140°F). Must be temperature compensated using an internal temperature sensor in the range of 0 to 40°C (32 to 104°F).  Long term stability shall be <±2% of reading/yr.  Must be IP67 rated.  Analog outputs shall be 0…5V, 0…2.5V, or 4…20 mA; serial outputs shall be RS-232 or RS-485.  Operating voltage shall be 10…36 VDC.  Power consumption must be < 1W.  Must be capable of calibration in place using certified gases.

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