Vaisala HMI41 Humidity and Temperature Meter

Vaisala HMI41 Humidity Indicator Kit

The Vaisala HUMICAP^®Humidity Indicator HMI41 fitted with the Vaisala HUMICAP^® Humidity and Temperature Probes HMP42 or HMP46 can be used for spot checking and field calibration applications.

Features

Two probe options HMP42 or HMP46
RH measurement range 0 ... 100 %RH
Temperature measurement range -40 ... +100 °C (-40 ... +212 °F), with the HMP46 only for short periods up to +180 °C (+356 °F)
Calculates dew point, wet bulb temperature, absolute humidity and mixing ratio
Versatile and easy-to-use
Incorporates Vaisala HUMICAP^® Sensor
Excellent stability
Data collection with serial line
NIST traceable (certificate included)
Optional carrying case and calibration cable

Technical Specifications

Humidity measurement
	Measurement range	0 ... 100 % RH
	Accuracy at +20 °C (+68 °F)	± 1 % RH (0 ... 90 % RH) HMP46 ± 2 % RH (90 ... 100 % RH) HMP46 ± 2 % RH (0 ... 90 % RH) HMP42 ± 3 % RH (90 ... 100 % RH) HMP42
	Factory calibration uncertainty (+20 °C / +68 °F) 0 … 15 %RH 15 … 78 %RH	±1 %RH ±1.5 %RH
	Typical long-term stability	better than 1 %RH per year
	Sensor
	HMP46	Vaisala HUMICAP® 180
	HMP42	Vaisala HUMICAP® MINI

Temperature measurement
	Measurement range
	HMP42 & HMP46	-40 ... +100 °C (-40 ... +212 °F)
	HMP46 short-term measurement	-40 ... +180 °C (-40 ... +356 °F)
	Sensor
	HMP42 & HMP46	Pt100 IEC 751 class B
HMI41 Indicator
	Operating temperature	-20 ... +60 °C (-4 ... +140 °F)
	Storage temperature	-40 ... +70 °C (-40 ... +158 °F)
	Power supply	4 batteries, type AA (LR 6)
	Battery operation time
	(alkaline batteries)	72 h continuous use

Vaisala HMI41 Data Sheet

Vaisala HMI41 Humidity Indicator Kit

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