
49
Technical data
HMI41 indicator
Calculated variables dewpoint temperature,
absolute humidity,
wet bulb temperature, mixing ratio
Resolution 0.1 %RH; 0.1 °C/°F
Power supply 4 batteries, type AA (LR 6)
Battery operation time
(alkaline batteries) 72 h continuous use
Auto-off function
Operating temperature -20 ... +60 °C (-4 ... +140 °F)
Storage temperature -40 ... +70 °C (-40 ... +158 °F)
Display two line LCD
Housing material ABS plastic
Housing classifi cation IP53 (with connectors blocked)
Weight (incl. batteries) 300 g
Maximum measurement error of indicator at +20 °C
humidity ±0.1 %RH
temperature ±0.1 °C (±0.18 °F)
TEMPERATURE
Continuous measurement -40 ... +100 °C (-40 ... +212 °F)
Short-term measurement -40 ... +180 °C (-40 ... +356 °F)
Accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F)
Accuracy over the measurement range
Temperature sensor Pt 100 IEC 751 1/3 class B
General
Typical ranges of calculated variables
dewpoint temperature -20 ... +100 °C (-4 ... +100 °F)
absolute humidity 0 ... 600 g/m
3
wet bulb temperature 0 ... 100 °C (32 ... 212 °F)
mixing ratio 0 ... 600 g/kg d.a.
The accuracies of these calculated variables are limited by the
accuracies of the measured variables on which they are based,
namely RH and T. The RH and T accuracies are stated under
HMP46 probe.
Cable length 1500 mm; extended spiral cable
Operating temperature range
for electronics -20 ... +60 °C (-4 ... +140 °F)
Housing material
Electronics housing ABS plastic
Probe stainless steel
Housing classifi cation
electronics IP65 (NEMA 4)
Sensor protection sintered fi lter, part no. 0195
optionmembrane fi lter, part no. 10159HM (max +80 °C / +176 °F)
plastic grid, part no. 6221 (max +80 °C / +176 °F)
Weight 450 g
Electromagnetic compatibility Complies with EMC standard
EN61326-1, Portable Equipment
HMP46 probe
HUMIDITY
Measurement range 0 ... 100 %RH, non-condensing
Accuracy (incl. nonlinearity, hysteresis and repeatibility) at +20 °C
Maximum achievable accuracy when calibrated against
high quality, certifi ed humidity standards:
0 ... 90 %RH ±1 %RH
90 ... 100 %RH ±2 %RH
When calibrated against salt solutions (ASTM E104-85)
0 ... 90 %RH ±2 %RH
90 ... 100 %RH ±3 %RH
Temperature Dependence
Typical long-term stability better than 1 %RH per year
Response time (90%)
at +20 °C in still air w/sintered fi lter 15 s
Humidity sensor HUMICAP
®
180
Ref. B210940EN-A ©Vaisala 2010
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in any form without the prior written consent of Vaisala is strictly
prohibited. All specifi cations — technical included — are subject
to change without notice.
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
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