Temperature regulator Ospel RTM-20 5–60°C 230V AC without probe (EXT10000115)

Ospel RTM-20 is a mains-powered temperature regulator designed to control heating, ventilation and air conditioning equipment within a 5–60°C range. Intended for 230V AC installations and delivered without an external probe, the device provides an adjustable temperature setpoint and a relay output for switching boilers, pumps, valves or fan coils. The compact regulator is suitable for residential and light commercial applications where straightforward temperature maintenance and reliable on/off control are required.

Advantages

The RTM-20 offers a clear setpoint control across a 5–60°C range and simple relay switching compatible with standard 230V AC systems. Supplied without a probe, it enables flexible selection of a sensor type and mounting location to match specific installation needs. Its design focuses on basic, dependable temperature regulation with easy integration into existing HVAC circuits and straightforward operation for installers and end users.

Suitable for

• Domestic boiler temperature control
• Radiator or underfloor heating zone switching
• Fan coil units and small air handling equipment
• Temperature maintenance in utility rooms or plant cabinets

Key specifications

• Supply voltage: 230 V AC
• Controlled temperature range: 5–60 °C
• Output type: relay (on/off) suitable for switching heating loads
• Sensor: device supplied without external probe (probe to be selected separately)
• Mounting: panel or DIN-rail compatible enclosure dimensions for electrical cabinets (refer to technical drawing)
• Application class: residential and light commercial HVAC systems

How to use

Install the RTM-20 in accordance with local electrical regulations, ensuring a secure 230 V AC supply connection and correct relay wiring to the controlled heater, pump or valve. Select and fit a compatible external temperature probe in the location representative of the space or medium to be regulated. Set the desired temperature within the 5–60 °C range using the regulator’s setpoint control. Verify the relay operation by observing the controlled device switching at the chosen setpoint and make any necessary adjustment to probe placement or setpoint for accurate temperature control.

Usage recommendations

For reliable performance, use a probe type and installation position appropriate for the controlled medium (air, water or surface). Ensure wiring and protective devices match the switched load and local standards. Periodic verification of setpoint accuracy and probe condition is recommended to maintain stable temperature control.