Technical Specifications of T21 Digital Dual Timer Thermostat

Functionality

The T21 thermostat operates in either cooling or heating mode. It features a relay timer for controlling two desired temperatures: one direct temperature setting and a second programmable temperature.

Temperature Sensor

• Measurement range: -20°C to 80°C
• Resolution: 0.1°C
• Accuracy: ±0.2°C

Control Features

• Includes hysteresis to prevent frequent switching
• Supports both progressive and cyclic operation modes

Hardware Specifications

• Inputs: 1 temperature sensor
• Outputs: 2 relays
• Power supply: 230 V
• Dimensions: 170 x 132 x 82 mm
• Protection rating: IP55 (dust protected and water jets resistant)

Compliance and Standards

Meets European directives and standards: 89/392/CEE, 73/336/CEE, and 73/23/CEE.

Summary

The T21 thermostat is a versatile digital dual timer device designed for precise temperature control in heating or cooling applications. Its programmable dual temperature settings, high sensor accuracy, and robust protection rating make it suitable for industrial or commercial environments requiring reliable temperature regulation.