Vaisala HMT100 Technical data

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HMT100 Series Humidity and Temperature Transmitter for Demanding HVAC Applications

HMT100 remote probe and wall mount models.

Features/Beneﬁts

Full 0 ... 100 %RH measurement

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Two-wire loop-powered or

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three-wire voltage output conﬁgurations

Fixed and remote probe

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models

Display available

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Relative humidity, dewpoint,

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temperature outputs

Vaisala HUMICAP® sensor

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Interchangeable probe module

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for minimal maintenance downtime

Dierent output scalings

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Compatible with hand-helds

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HM70 and HMI41 for calibration

IP65 (NEMA 4) housing

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NIST traceable (certiﬁcate

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included)

The Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT100 are designed for humidity and temperature monitoring in demanding environments.

Typical applications include stability rooms, HVAC, livestock farms, greenhouses, indoor swimming pools, and outdoor applications.

Performance

HMT100 incorporates Vaisala HUMICAP relative humidity accurately and reliably. Vaisala HUMICAP resistant to dust and most chemicals.

Available options

The HMT100 is available as a wall mount or remote probe model with an optional display. For high temperature applications or where space is limited, the remote probe is ideal.

technology that measures

is also

HMT100 can show relative humidity only, dewpoint only, or relative humidity and temperature, or dewpoint and temperature readings.

The probes are interchangeable without having to calibrate or adjust the transmitter.

HMT100 can also be installed outdoors using an installation kit, or directly into an air conditioning channel using a duct installation kit.

Annual calibration

Calibration is recommended typically at an interval of one year using either the Vaisala HUMICAP Humidity and Temperature Meter HM70 or the Vaisala HUMICAP Humidity Indicator HMI41.

The accuracy of the instrument can also be checked using the Vaisala Humidity Calibrator HMK15, which is based on saturated salt solutions.

Hand-held

Technical data

Performance

RELATIVE HUMIDITY

Measurement range 0 ... 100 %RH Accuracy against factory standards including non-linearity, hysteresis, and repeatability

at +15 ... +25 °C (+59 ... +77 °F) ±1.7 %RH (0 ... 90 %RH)

±2.5 %RH (90 ... 100 %RH) at ±0 °C ... +40 °C (+32 ... +104 °F) ±(1.7 +0.015 x reading) %RH at -40 ... ±0 °C, +40 ... +80 °C ±(2.0+0.025 x reading) %RH (-40 ... +32 °F, +104 ... +176 °F)

Factory calibration uncertainty at +20 °C (+68 °F) Response time (90 %) at 20 °C in still air

Humidity sensor Vaisala HUMICAP

TEMPERATURE

Measurement range -40 ... +80 °C (-40 ... 176 °F) Accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F)

ACCURACY OVER TEMPERATURE RANGE

±1.0 %RH (0 ... 15 %RH)

±1.5 %RH (>15 ... 78 %RH)

8 s with plastic grid

20 s with membrane ﬁlter

40 s with sintered ﬁlter

180

Inputs and outputs

Two-wire output signal 4 ... 20 mA

External loop load 10 ... 35 VDC (R

20 ... 35 VDC (R

= 0 ohms)

= 500 ohms)

Voltage output signals 0 ... 1 V, 0 ... 5 V, 0 ... 10 V

(0 ... X V see order form) Supply voltage 10 ... 35 VDC/24 VAC Current consumption, 35 VDC/24 VAC max. 12 mA External load R

min. 10 kΩ

Mechanics

Material

Housing ABS/PC plastic Probe chrome coated aluminum Mounting plate GM45160 ABS plastic

Housing classiﬁcation IP65 (NEMA 4) Sensor protection

Plastic grid DRW010522 Plastic grid with membrane ﬁlter DRW010525 Sintered stainless steel ﬁlter HM46670SP

Connections screw terminals 0.5 ... 1.5 mm Probe cable lengths 3 m, 5 m, 10 m Calibration with HM70, HMI41,

or with internal 11 %RH & 75 %RH buttons

Display option

One line ﬁxed variable or changing variables when two variables are ordered

Temperature sensor Pt1000 IEC 751 1/3 class B

DEWPOINT TEMPERATURE (CALCULATED)

Measuring range -20 ... +80 °C (-4 ... +176 °F)

Operating Environment

Operating temperature range

transmitter body, no display -40 ... +60 °C (-40 ... +140 °F) transmitter body, with display -30 ... +60 °C (-22 ... +140 °F)

probe (remote probe only) -40 ... +80 °C (-40 ... +176 °F) Storage temperature range -40 ... +60 °C (-40 ... +140 °F) Electromagnetic compatibility

Industrial Environment

For more information, visit www.vaisala.com or contact us at sales@vaisala.com

EN61326-1,

Options and accessories

Spare probe HMP100 Spare extension cable (10 m) DRW220095 Radiation shield DTR502B Rain shield with installation kit 215109 Installation plate DRW010699 Duct installation kit 215619 Connection cable for HMI41 2591722 Connection cable for HM70 211339

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