Temperature Measurement and Control Equipment

Temperature Controllers

Temperature controllers are electronic thermostats that show the value read from the connected sensor on a display, compare it with the set point and switch a heater, compressor, fan or alarm circuit through a relay output. Most devices in the category are compact panel types with one input, one output and on-off (ON/OFF) operation.

Types with NTC or PTC probes are used in refrigerated cabinets, cold rooms and heating units; types with Pt100 or type J thermocouple input are used in heating applications up to 400–800 °C. On compact models with a 77 × 35 mm housing and 3-digit display, the relay contact is rated 10 A / 250 V and the front is IP65 protected.

77 × 35 mmcompact housing

10 Arelay output

IP65front panel

−50…800 °Cmeasurement by sensor

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Main Applications

Compressor control in cold rooms, refrigerated cabinets and displays
Temperature control of electric heaters, heating elements and drying cabinets
Ambient temperature in incubator and greenhouse applications
Heating element control in hot water tanks and calorifiers
Over-temperature alarm in machine panels

Technical Data

Device type	Panel-mounted digital ON/OFF temperature controller
Housing dimensions	77 × 35 × 62.5 mm (compact type)
Display	3-digit digital
Sensor inputs	NTC, PTC, type J and K thermocouple, 2-wire Pt100 / Pt1000
Measuring range (NTC / PTC)	NTC −50…100 °C · PTC −50…150 °C
Measuring range (Pt100 / Pt1000)	−50…400 °C
Measuring range (type J)	0…800 °C
Output	Relay 10 A / 250 V; optional SSR drive (max. 15 V, 28 mA)
Control	Heating or cooling, ON/OFF; alarm output
Supply	230 V AC ±15%, 50/60 Hz; optional 115 V AC, 24 V AC
Front panel protection	IP65
Operating conditions	0…50 °C (−20…+70 °C depending on version), 90% RH, non-condensing

Material Options

Part	NTC / PTC input	Pt100 / Pt1000 input	Thermocouple (J / K) input
Measuring range	NTC −50…100 °C · PTC −50…150 °C	−50…400 °C (2-wire)	J: 0…800 °C · K: depending on model
Housing	Plastic, 77 × 35 × 62.5 mm	Plastic, 77 × 35 × 62.5 mm	Plastic, 77 × 35 × 62.5 mm
Output	Relay 10 A / 250 V; optional SSR	Relay 10 A / 250 V; optional SSR	Relay 10 A / 250 V; optional SSR
Front panel	IP65	IP65	IP65
Typical use	Cooling and low temperature	Heating and process	Furnace and high temperature

Note: Values are from the manufacturer manual of the compact ON/OFF type; inputs, outputs and protection of models with other front sizes and multiple outputs vary by model. For applications needing PID or proportional control, see the process control devices page.

Advantages

Compact mounting

The 77 × 35 mm housing fits narrow panel doors.
Panel thickness can be up to 15 mm.

Sensor flexibility

The same family includes NTC, PTC, Pt100 and thermocouple input types.
The device is chosen to suit the existing sensor.

Direct switching

The 10 A relay contact drives small heaters and fans directly.
SSR drive types are used for loads switched frequently.

Protected front

The front panel is IP65 protected.
Suitable for panels in damp and dusty areas.

Construction and Design Features

Panel-mounted plastic housing
3-digit digital display and front panel keys
Sensor input terminals
Relay or SSR drive output
230 V AC supply connection (optional 115 / 24 V AC)

Send us the sensor type, measuring range, output type and supply voltage via the Request a Quote form and we will propose the controller together with a suitable sensor.

How to Choose?

Define the sensorNTC / PTC is common for cooling, Pt100 or type J thermocouple for high temperatures.
Check the measuring rangeThe operating temperature must stay within the range of the chosen sensor type.
Choose the output typePrefer a relay for direct loads and SSR drive output for heating elements switched frequently.
Confirm the supply voltageChoose the 230 V, 115 V or 24 V type according to the panel supply.
Measure the panel cut-outMake sure the panel cut-out suits the device housing.