Honeywell Commercial TR21-A Temperature Sensor

The Honeywell Commercial TR21-A Temperature Sensor is a high-precision, non-linear temperature sensor designed for networked environments, delivering accurate readings for commercial controls. This direct-wired, wall-mount sensor supports a set point range of 55 to 85 Deg F with an accuracy of ±0.36 Deg F.

Designed for reliability, the TR21-A uses a unique 10 KΩ non-linear element (two 20 KΩ in parallel) for stable performance across a wide operating window. The white, compact body mounts easily on walls, and uses unshielded twisted pair cable for simple integration with HVAC and building automation systems.

Key specs make it ideal for precision sensing in demanding environments, with rugged approvals and a broad temperature and humidity range to suit commercial facilities.

• Type: Non-Linear, Direct Wired
• Set Point Range: 55–85 Deg F
• Accuracy: ±0.36 Deg F
• Cable: Unshielded, Twisted Pair
• Mounting: Wall Mount
• Sensor Configuration: 10 KΩ Non-Linear (2 × 20 KΩ in parallel)
• Operating Temp: 45–99 Deg F
• Storage Temp: -40 to 150 Deg F
• Humidity: 5–95% RH non-condensing
• Approvals: UL 94, CE, FCC
• Application: Network Sensor