DERELL DEG-37-R-A | New Generation Heating & Cooling Controller

DEG-37-R-A is a compact digital controller with 2 relay outputs and a PTC sensor input. It can operate in either heating or cooling mode, and features *alarm handling, offset adjustment, and sensor fault scenarios*.

Functions: Mode selection (Heating/Cooling), independent OUT and ALARM relays, adjustable hysteresis, password protection, offset calibration, fault-based relay control logic.

Use Cases: Refrigeration cabinets, electric heaters, pump automation, industrial thermal control systems.

▶︎ Technical Specifications

Dimensions: 36x72 mm | Panel Cutout: 32x67 mm
Power Supply: 100~240VAC, 50/60Hz
Input: PTC temperature sensor
Outputs: OUT (NO+NC), ALARM (NO), 250VAC 2A resistive
Display: 3-digit 7 segment LED
Measurement Range: -50°C to +150°C
Accuracy: ±1°C, Resolution: 0.1°C
Protection: IP20, indoor panel use only
Installation: Quick-connect socket terminals

▶︎ Editor’s Notes & Experience

This unit works great in low-temp environments where PTC sensors offer stable accuracy. Second relay can be programmed for extra functions: alarms, pump control, or system interlocks.

3-key design makes it super easy to configure remotely or guide operators over the phone. Highly stable in electrically noisy environments like inverter panels thanks to its galvanic isolation.

If the sensor fails, the device switches OUT relay using internal timers (ToF & ToN). Settings remain saved in memory, even after power loss.

+ DERELL Electronics Main Page

+ DERELL Temperature Controllers

+ DERELL Cooling Controllers

+ DERELL PTC / NTC Sensors