Table 11: A99B Series Positive Temperature Coefficient Sensors
1
Sensing range
1
Type A99BA and A99BB: -40°F to 212°F (-40°C to 100°C)
Type A99BC: -40°F to 248°F (-40°C to 120°C)
Reference resistance 1,035 ohms at 77°F (25°C) and 855 ohms at 32°F (0°C)
Accuracy 0.9°F (0.5°C) between 5°F and 167°F (-15°C and 57°C). Refer to the
A99B Series Temperature Sensors Product/Technical Bulletin (LIT-125186)
for accuracy rating outside of this temperature range.
Sensor construction Probe: Stainless steel
Sensor cable sheath Type A99BA: Shielded PVC cable
Type A99BB: PVC cable
Type A99BC: High temperature silicon cable
Wire gauge 22 AWG
Ambient operating
conditions
Type A99BA and A99BB: -40°F to 212°F (-40°C to 100°C); 0% to 100%
RH, condensing
Type A99BC: -40°F to 248°F (-40°C to 120°C); 0% to 100% RH,
condensing
Ambient storage
conditions
Type A99BA and A99BB: -40°F to 221°F (-40°C to 105°C); 0% to 100%
RH, condensing
Type A99BC: -40°F to 266°F (-40°C to 130°C); 0% to 100% RH,
condensing
Shipping weight 1.4 oz (41 g) for 6 1/2 ft (2 m) sensor
Accessories See Table 7
1 When any A99 Series Temperature Sensor is connected to a standard A421 Control model, the range of displayed
temperature values is -40ºF to 212ºF or -40ºC to 100ºC.
The performance specifications are nominal and conform to acceptable industry standards. For
application at conditions beyond these specifications Johnson Controls shall not be liable for damages
resulting from misapplication or misuse of its products.
27A421 Series Electronic Temperature Controls with Off-Cycle Defrost Installation Guide
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