Table 6: A99 Temperature Sensors selection chart
1
Product code Description
A99BC-300C
1
PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 9.8 ft (3.0 m) high-
temperature silicon cable; ambient operating temperature range: -40ºF to 248ºF
(-40ºC to 120ºC)
A99BC-500C
1
PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 16.4 ft (5.0 m) high-
temperature silicon cable; ambient operating temperature range: -40ºF to 248ºF
(-40ºC to 120ºC)
A99BC-1500C
1
PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 49.2 ft (15.0 m) high-
temperature silicon cable; ambient operating temperature range: -40ºF to 248ºF
(-40ºC to 120ºC)
A99CB-200C PTC Temperature Sensor: Extended probe 6 in. (15.2 cm) with 6.6 ft (2.0 m) PVC
cable; ambient operating temperature range: -40ºF to 212ºF (-40ºC to 100ºC)
A99CB-600C PTC Temperature Sensor: Extended probe 6 in. (15.2 cm) with 19.7 ft (6.0 m) PVC
cable; ambient operating temperature range: -40ºF to 212ºF (-40ºC to 100ºC)
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.
Table 7: Accessories
Product code Description
BKT287-1R 12 in. (305 mm) long DIN rail section
BKT287-2R 36 in. (914 mm) long DIN rail section
PLT344-1R Two end clamps for DIN rail sections
A99-CLP-1 Surface mounting clip for A99B and A99C Series Temperature Sensors
SHL10-603R Sun shield for A99B and A99C Series Temperature Sensors
BOX10A-603R PVC enclosure for A99B and A99C Series Temperature Sensors
WEL11A-601R Copper and brass immersion well for applying sensor in fluid applications
TE-6300W-102 Stainless steel immersion well for applying A99 sensors in fluid applications.
A99CB Type sensors with extended probe with this immersion well.
Technical specifications
Table 8: A421 Series Electronic Temperature Controls
Power consumption 1.8 VA maximum
Supply power 110/120 VAC or 208/230/240 VAC, 50/60 Hz
Ambient conditions Operating: Type 1 models: -40°F to 150°F (-40°C to 66°C), 0% to 95% RH
noncondensing
Type 4X models: -40°F to 140°F (-40°C to 60°C), 0 to 95% RH noncondensing
Shipping and storage: All models: -40°F to 185°F (-40°C to 85°C), 0% to 95%
RH noncondensing
Temperature control
range
-40°F to 212°F or -40°C to 100°C
25A421 Series Electronic Temperature Controls with Off-Cycle Defrost Installation Guide
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