Submittal Sheet
Table Of Contents
SPECIFICATION DATA
63-4521-01
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 Con-
troller, 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 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.
Wall Mount
Duct Mount
Outdoor
Mount