Boiler Thermostats
A boiler thermostat is an immersion control device that senses water temperature with a rigid bulb in the boiler or calorifier pocket and switches the burner or pump at the set value.
It is used on central heating boilers, hot water calorifiers and high-temperature water circuits. The product range includes immersion boiler thermostats with 0/90 °C and 40/210 °C setting ranges.
Main Applications
- Heating boiler burner control
- Calorifier temperature control
- Circulation pump control
- High-temperature water circuits
- Hot water storage tanks
- Boiler control outside the panel
Technical Data
| Type | Immersion (boiler) thermostat |
|---|---|
| Setting ranges | 0/90 °C and 40/210 °C |
| Differential | 4 K ±1 (0/90 °C) · 9 K ±2 (40/210 °C) |
| Contact | SPDT, 10(2.5) A / 250 V |
| Rigid bulb | 7 × 8 mm; 50 / 100 / 200 mm length |
| Protection class | IP40 |
| Max. ambient temperature | 80 °C |
| Cable entry | M20 × 1.5 gland |
| Mounting | 1/2″ pocket |
Material Options
| Part | 0/90 °C type | 40/210 °C type |
|---|---|---|
| Differential | 4 K ±1 | 9 K ±2 |
| Typical use | Heating and hot water | High-temperature water and process |
| Contact | SPDT 10(2.5) A | SPDT 10(2.5) A |
| Bulb | 7 × 8 mm, brass sheath | 7 × 8 mm, brass sheath |
Which material? Values come from the boiler thermostat manufacturer sheet. A boiler thermostat is for operating control; a fixed-setting limit thermostat must also be used for over-temperature safety.
Advantages
Straight into the Boiler
- Mounted in a 1/2″ pocket
Two Ranges
- 0/90 and 40/210 °C
Strong Contact
- 10(2.5) A
Narrow Differential
- 4 K (0/90 type)
Construction and Design Features
- Rigid bulb with brass sheath
- Setting knob
- SPDT contact
- M20 cable gland
Send the setting range, bulb length and controlled device; we will confirm a suitable boiler thermostat from stock.
How to Choose?
- Pocket and bulbChoose a bulb length to suit the boiler pocket.
- AmbientCheck ambient does not exceed 80 °C.
- Setting rangeChoose 0/90 for heating, 40/210 °C for high-temperature water.
- Contact loadCompare burner or pump load with the contact rating.
Complementary Products
Why ORFA?
Other Thermostats
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Frost protection thermostats protect air and water coils from freezing by reacting when temperature falls.
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Capillary Thermostats
Capillary thermostats sense temperature through a capillary bulb and switch a contact at the set value.
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Incubator Thermostats
Incubator thermostats keep the temperature in incubators steady and precise.
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Surface Thermostats
Surface thermostats sense temperature through contact with a pipe or surface and switch a contact.
Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.