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:
q 0 to 95% RH non-condensing. RH Measurement Range:
q 0-100% RH Humidity Accuracy:
q ±2%, ±3% or ±5% from 20 to 95% RH. 1K Ohm Temperature Accuracy:
q ± (0.15 + 0.002t) C t = actual temperature in C 20K Ohm Temperature Accuracy:
q ±0.4°F at 77°F (±0.2°C at 25°C) 1K Ohm Temperature Output Range:
q Room: 32 to 122°F (0 to 50°C).
q Duct: -58 to 572°F (-50 to 300°C). 20K Ohm Temperature Output Range:
q Room: 40° to 110°F (4° to 43°C).
q Duct/Outdoor: -40° to 240°F (-40° to 116°C). Hysteresis:
q Less than ±0.5% RH. Supply Voltage:
q 4-20mA Output: 250 Ohm Load 15 – 40 VDC / 18 – 28 VAC
q 4-20mA Output: 500 Ohm Load 18 – 40 VDC / 18 – 28 VAC
(500 Ohm Load Max)
q 0-5 VDC Output: 12 – 40 VDC / 18 – 28 VAC (10K Load
q 0-10 VDC Output: 18 – 40 VDC / 18 – 28 VAC (10K Load
Minimum) Maximum Supply Current:
q Current Mode: 24 mA.
q Voltage Mode: 8 mA. Finish:
q Room Enclosure: ABS Plastic (UL94-VO rated).
q Duct Enclosure: ABS Plastic (UL94-5VA rated).
q Outdoor Enclosure: ASA Plastic (UL-94V0 rated). Compensated Temperature Range: Full RH Range
q Room: 32 to 122°F (-0 to 50°C).
q Duct/Outdoor: -10 to 140°F (-23 to 60°C) Humidity Response Time:
q 200 seconds.
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