Submittal Sheet

SPECIFICATION DATA
63-4521-04
H7625, H7635, H7655 Series 2000
Humidity/Temperature Sensors
The H7625, H7635, and H7655 are highly accurate, stable
humidity transducers designed for use with HVAC
controllers such as the T7350 Thermostat, H775 Remote
Humidity Controller, and W7760 Direct Digital Controllers.
The Ceramic Technology humidity sensor is not affected by
condensation and provides excellent long-term stability.
FEATURES
• Ceramic Technology overcomes the limitations of
other resistance based humidity sensors that use
water soluble polymer coatings.
• Ceramic Technology allows sensors to recover fully
from condensation, fog, and high humidity.
• Highly accurate, repeatable, stable output with
negligible hysteresis.
• Temperature compensated output
• Zero and span trimmers, and increment/decrement
recalibration feature.
• All units have selectable 4-20mA, 0-10Vdc, or 0-5Vdc
output.
• NIST traceable 2%, 3%, and 5% calibration, every
sensor calibrated at 3 different points.
SPECIFICATIONS
Operating RH Range:
 0 to 95% RH non-condensing.
RH Measurement Range:
 0-100% RH
Humidity Accuracy:
 ±2%, ±3% or ±5% from 20 to 95% RH.
1K Ohm Temperature Accuracy:
 ± (0.15 + 0.002t) C t = actual temperature in C
20K Ohm Temperature Accuracy:
 ±0.4 °F at 77 °F (±0.2 °C at 25 °C)
1K Ohm Temperature Output Range:
 Room: 32 to 122 °F (0 to 50 °C).
 Duct: -58 to 572 °F (-50 to 300 °C).
20K Ohm Temperature Output Range:
 Room: 40 to 110 °F (4 to 43 °C).
 Duct/Outdoor: -40 to 240 °F (-40 to 116 °C).
Hysteresis:
 Less than ±0.5% RH.
Supply Voltage:
 4-20mA Output: 250 Ohm Load 15 – 40 VDC / 18 -
28 VAC
 4-20mA Output: 500 Ohm Load 18 – 40 VDC / 18 -
28 VAC (500 Ohm Load Max)
 0-5 VDC Output: 12 - 40 VDC / 18 - 28 VAC (10K Load
Minimum)
 0-10 VDC Output: 18 - 40 VDC / 18 – 28 VAC (10K Load
Minimum)
Maximum Supply Current:
 Current Mode: 24 mA.
 Voltage Mode: 8 mA.
Finish:
 Room Enclosure: ABS Plastic (UL94-VO rated).
 Duct Enclosure: ABS Plastic (UL94-5VA rated).
 Outdoor Enclosure: ASA Plastic (UL-94V0 rated).
Compensated Temperature Range: Full RH Range
 Room: 32 to 122 °F (-0 to 50 °C).
 Duct/Outdoor: -10 to 140 °F (-23 to 60 °C)
Humidity Response Time:
 200 seconds.
Saturation Response Time:
 10 minutes.
Sensitivity:
 0.1% RH.
Interchangeability:
 Less than ±3% RH nominal.
Repeatability:
 0.5% RH.
Long term drift:
 Less than 2% RH drift/5 years.
Wall Mount
Duct Mount
Outdoor
Mount