Submittal Sheet

C7770, C7776, C7778 AIR TEMPERATURE SENSORS
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
® U.S. Registered Trademark
© 2012 Honeywell International Inc.
74-2868—05 L.L. Rev. 01-2012
Printed in United States
TYPICAL SENSOR
RESISTANCE
Table 2. Typical Resistance of Sensor Models.
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, C7776A, or
C7778A 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:
(for 20K ohm sensors only)
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.
Typical Resistance (in ohms)
C7770
(20K Ohm
NTC)
C7776
(10K Ohm
NTC Type II)
C7778
(10K Ohm
NTC Type III)
At 41°F (5°C) 54,200 25,392 23,467
At 50°F (10°C) 41,758 19,901 18,789
At 59°F (15°C) 32,427 15,712 15,137
At 68°F (20°C) 25,370 12,493 12,268
At 77°F (25°C) 20,000 10,000 10,000
At 86°F (30°C) 15,856 8,057 8,196
At 95°F (35°C) 12,654 6,531 6,754