Specifications

100 Commerce Way, Woburn, MA 01801
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18
HMI 41 Indicator
Calculated variables dewpoint temperature,
absolute humidity, wet bulb
temperature, mixing ratio
Resolution 0.1 %RH; 0.1 °F
Power supply 4 batteries, type AA (LR 6)
Battery operation time (alkaline
batteries) 72 h continuous use
Auto-off function
Operating temperature -4...+140 °F (-20...+60 °C)
Operating storage non-condensing
Storage temperature -40...+158 °F (-40...+70 °C)
Display two line LCD
Housing material ABS plastic
Housing classification IP 53 (with connectors blocked)
Weight (incl. batteries) 300 g
Options
calibrator function see front page for cable part no.
carrying case for HMI41 & HMP46 part no. 85-21797
serial communication cable part no. 19446
Maximum measurement error of indicator at +68°F (+20 °C)
humidity ±0.1 %RH
temperature ±0.18
0
F (±0.1
0
C)
Dimensions in mm
HMP 46 Probe
Humidity
Measurement range 0...100 %RH non condensing
Maximum achievable accuracy when calibrated
against high quality, certified 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 filter 15 s
Humidity sensor HUMICAP
®
180
Temperature
Continuous measurement -40+212 °F (-40+100°C)
Short-term measurement -40+356 °F (-40+180°C)
Accuracy at 68
0
F (+20°C) ±0.36°F (±0.2 °C)
Accuracy over the measurement range
Temperature sensor Pt 100 IEC 751 1/3 class B
General
Typical ranges of calculated variables
dewpoint temperature -40+212 °F (-40...+100°C)
absolute humidity 0...600 g/m
3
wet bulb temperature 32+212 °F (0...100°C)
mixing ratio 0...600 g/Kg d.a.
Cable length 1500 mm; extended spiral cable
Operating temperature range
for electronics -4...+140 °F (-20...+60 °C)
Electronics housing ABS plastic
Probe head stainless steel
Housing classification
electronics NEMA 4 (IP 65)
Sensor protection sintered filter, part no. 0195
option membrane filter, part no. 10159HM
plastic grid, part no. 6221
Weight 450 g
Meets EMS standards EN50081-1 and EN50082-2
HMI 41
TECHNICAL DATA - HMI 41 & HMP 46 CALIBRATOR/INDICATOR AND PROBE
HMP 46
-40
0
40
16080
120
2
1
0
-1
-2
-20 20 60
100
140
180
1.5
0.5
-0.5
-1.5
error %RH
T/˚C
˚C
-40 -20 0 20 40 60 80 100 120 140 160
T/˚C
0.6
0.4
0.2
-0.2
-0.4
-0.6
0
180
error%RH
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