Duct Temperature Sensor 20kΩ

FEATURES

The C7770A Air Temperature Sensor is a direct wired temperature sensor that is used to sense discharge or return air in a duct. The C7770A Sensor contains a temperature sensitive 20K ohm NTC nonlinearized thermistor and are compatible with the Excel 10 controller.

• Primary and/or secondary sensor for use with electronic control systems.
• Integral 20K ohm NTC, 10K ohm NTC Type II, or 10K ohm NTC Type III nonlinear sensors
• Operating range of 45 to 99°F (7 to 37°C).
• Mounts on a flat duct or plenum surface or, for a plenum- rated application, in a standard utility conduit box.
• Probe length of 6 in. (152 mm)
• Rugged 1/4 in. diameter aluminum insertion probe.

SPECIFICATIONS

Dimensions
• Probe Length (incl. mechanical strain relief): 6 in. (152 mm)
• Probe Diameter: 1/4 in. (6 mm)
• Flange Height: 7/8 in. (22 mm)
• Flange Width: 2 in. (51 mm)

Environmental Ratings:
• Operating Temperature: 45° to 99°F (7° to 37°C)
• Shipping Temperature: -40° to 150°F (-40° to 65°C)
• Relative Humidity: 5% to 95% noncondensing
• Vibration: V2 level
• Corrosion: Office environment

Temperature Sensor Accuracy:
• Honeywell controllers used with the C7770A employ an algorithm that provides readings close to the actual temperature. Across the range of 41 to 99°F (5 to 37°C) the accuracy is better than ±0.36°F (±0.2°C).

Long-term temperature sensor drift
• Maximum sensor drift is nominally +/-0.13°F after 5 years of operation, no appreciable drift thereafter. No calibration of the device is possible. Long term drift calibration/maintenance through controller software is typically not necessary.

Input Rating
• 0.5 mA pulsed constant current.

Mounting Options
• Mounts on flat duct or plenum surface or, for a plenum-rated applications, in a standard utility conduit box.

Approvals
• NEC Class II
• CE