Specifications

100 Commerce Way, Woburn, MA 01801
TEL: 1-888-VAISALA (824-7252) FAX: [phone]
E-MAIL: [e-mail] Access catalog on-line at: www.vaisala.com/inc/ssdcat
34
Measured Variables
Relative Humidity
Measurement range 0...100%
Accuracy (including non-linearity and repeatability)
Maximum achievable when calibrated against high
quality, certified humidity standards: ±1%RH (0...90% RH)
±2%RH (90...100% RH)
When calibrated against
salt solutions (ASTM E104-85) ±2%RH (0...90% RH)
±3%RH (90...100% RH)
Response time (90%) at +68°F (+20
0
C)
in still air (with sintered filter) 15 s
Sensor HUMICAP
®
K
Re-gaining sensor HUMICAP
®
KC
Temperature
Measurement range -40...+356°F (-40°...+180°C)
Accuracy at +68°F (+20
0
C) 0.36°F (±0.2°C)
Sensor PT 100 RTD IEC 751 1/3 Class B
Typical temperature 0.005°F/°F (0.005°C/°C)
dependence of electronics
Calculated Variables
Typical ranges:
dewpoint temperature -40+212°F (-40...+100°C)
mixing ratio 0...500 g/kg d.a.
absolute humidity 0...600 g/m
3
wet bulb temperature 32°F (0...+100°C)
enthalpy -40...+460 kJ/kg (-17.2...+198.8 BTU/lb)
The accuracies of the calculated values are limited by the
accuracies of the measured quantities on which they are
based, namely RH and T. The RH and T accuracies are stated
above under Measured Variables.
Outputs
Two analog outputs selectable 0...20 mA 0...1V
and scaleable 4...20 mA 0...5V
0...10V
Serial output available RS 232C, RS 485/RS 422
or digital current loop
Alarm relays* 2 relays 8A/230VAC/24VDC SPCO**
General
Connections screw terminals for 0.5 mm
2
wires (AWG 20)
Operating voltage 24 VDC/VAC (20...28V)
Power consumption (standard configuration)
100 mA maximum
Recommended external load
for current outputs < 500 ohm
Recommended external load
for 0...1V ouput > 2 kohm
Recommended external load
for 0...5 and 0...10 V outputs > 10 kohm
Operating temperature range
for electronics -40...+140°F (-40...+60°C)
with display cover 32...+122 °F (0...+50 °C )
with power supply unit -40...+113 °F (-40...+45 °C)
Storage temperature range -40...+158°F (-40...+70°C )
Housing material G-AlSi12 (DIN 1725)
Housing classification NEMA 4 (IP 65)
Bushing for 7...10 mm diameter cables
(8 x 0.5 mm
2
shielded cable)
Cable lengths 2, 5, or 10 meters
Sensor protection stainless steel sintered filter
(ø 13.5 mm) PPS grid with stainless steel netting
Meets EC requirements on electromagnetic compatibility (10V/
m to 3V/m) depending on the filter.
Specifications subject to change without further notice.
HUMICAP
®
is a registered trademark of Vaisala.
Dimensions in mm
1/2" NPT swagelock
fitting and conduit
fitting adapter are
available
Mounting flange:
aluminum or
stainless steel
Ø 55
Ø 75
Ø 9.5
65
145
120
104
133
Ø 6.5
HMP 235
TECHNICAL DATA - HMP 235
Ø 13.5
220
30
2.5
Ø 25
29
cable length
2000, 5000
or 10000 mm
* Simultaneous installation with alarm outputs and internal
power supply module is not possible.
** SPCO = single pole change over
cable length 2, 5 or 10 meters
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