Honeywell Commercial TR21 Temperature Sensor

The Honeywell Commercial TR21 Temperature Sensor delivers precise, reliable temperature sensing for commercial network systems. This non-linear, 20K ohm NTC sensor is built for direct wired installations with a compact, wall-mount enclosure.

Set point range is 55 to 85°F with an exceptional accuracy of ±0.36°F, ensuring stable readings for HVAC control and building automation. The sensor operates from 45 to 99°F and stores in temperatures from -40 to 150°F, making it suitable for varied environments.

Designed for demanding settings, it tolerates 5-95% relative humidity (non-condensing) and uses unshielded twisted pair cable for easy integration into networks. The white housing measures 3 in W x 7/8 in D x 4-13/16 in H and is intended for wall-mount installation.

Certified to UL 94, CE, and FCC standards, the TR21 is a reliable choice for commercial sensors and networked temperature monitoring.

• Sensor type: 20KΩ NTC non-linear
• Set point: 55–85°F
• Accuracy: ±0.36°F
• Cable: Unshielded twisted pair, direct wired
• Mounting: Wall-mounted
• Environment: 45–99°F operating; -40 to 150°F storage; 5–95% RH non-condensing
• Size: 3 in W x 7/8 in D x 4-13/16 in H
• Color: White
• Approvals: UL 94, CE, FCC
• Application: Network sensor