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Showing Results For: Thermostatic Switches

Thermostatic Switches

Thermostatic switches are devices used to control temperature by automatically turning on or off a heating or cooling system based on the set temperature range. They work by measuring the environment's temperature and comparing it to the set temperature range. If the temperature exceeds the range, the switch will either turn the heating or cooling system on or off to maintain the desired temperature.

Types of Thermostatic Switches

There are two main types of thermostatic switches: electromechanical and electronic.

Electromechanical thermostatic switches use a bimetallic strip to sense temperature changes. When the temperature changes, the strip bends, which triggers the switch to turn on or off. These switches are reliable and durable but can have a limited temperature range.

Electronic thermostatic switches use a sensor to detect temperature changes and a microprocessor to control the switch. These switches can have a more comprehensive temperature range and are more precise than electromechanical switches.

Applications of Thermostatic Switches

Thermostatic switches have a wide range of applications, including:

  • HVAC systems: Thermostatic switches are commonly utilised in ventilation, heating, and air conditioning (HVAC) systems to maintain a comfortable temperature in a building.
  • Automotive industry: Thermostatic switches are used in vehicles to control the engine's temperature and prevent overheating.
  • Refrigeration systems: Thermostatic switches are used in refrigeration systems to maintain a constant temperature and prevent spoilage of food or other perishable items.
  • Industrial equipment: Thermostatic switches are used in industrial equipment to control the temperature of machinery and prevent overheating or freezing.

Advantages of Thermostatic Switches

Thermostatic switches offer several advantages, including:

  • Energy efficiency: Thermostatic switches help to save energy by only turning on heating or cooling systems when necessary.
  • Cost-effective: Thermostatic switches are relatively inexpensive and can help to reduce energy bills over time.
  • Improved comfort: Thermostatic switches can help to maintain a comfortable temperature in a building or vehicle.
  • Increased safety: Thermostatic switches can help to prevent overheating or freezing, which can be dangerous in specific applications.

Thermostatic switches are essential to many heating, cooling, and temperature control systems. With their precision, energy efficiency, and ease of use, these switches are essential for maintaining a comfortable and safe environment.


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RS Pro
Rohs Verified
733-4723, RS Pro
443 In Stock
Check Stock & Lead Times Packaging Options
1 +
£ 28.27
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£ 27.44
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£ 25.98
603021/70-2-064-00-2000-40-10-00-00-000-00-6/000, Jumo
2 In Stock
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£ 238.86
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£ 229.14
12 +
£ 219.19
RS PRO
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222-8236, RS PRO
108 In Stock
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£ 6.58
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£ 6.24
9 +
£ 6.10
RS PRO
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222-8246, RS PRO
Pre Order
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£ 6.38
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£ 6.06
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£ 5.94
602021/0005-027-000-25-1000-40-10-00-00-000-00-6, Jumo
2 In Stock
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£ 76.99
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£ 73.84
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£ 70.66
RS Pro
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733-4713, RS Pro
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£ 28.54
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£ 27.69
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£ 26.23
603021/01-1-043-30-0-00-20-13-46-100-8-6/000, Jumo
1 In Stock
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£ 179.07
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£ 171.78
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£ 164.30
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2455R--01000092, Honeywell
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£ 33.55
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2455RP-91000439, Honeywell
1523 In Stock
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£ 21.70
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£ 20.98
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£ 20.04
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2455RP-91000438, Honeywell
531 In Stock
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£ 21.70
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£ 21.09
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£ 19.92
Rohs Verified
55.60012.010.DIST, EGO
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£ 129.78
Honeywell
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2455R-100072, Honeywell
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£ 16.32
Honeywell
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2455R-100085, Honeywell
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£ 16.48
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2455R 82-711 F100C, Honeywell
998 In Stock
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£ 21.67
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2455R 82-714 F90C, Honeywell
598 In Stock
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733-4729, RS Pro
120 In Stock
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£ 28.31
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£ 27.45
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£ 25.98
603021/01-2-025-30-1000-40-10-00-00-000-00-6/000, Jumo
2 In Stock
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£ 177.45
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£ 170.24
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£ 162.82
608501/2160-818-02-2000-873-6-104-96-46-150-20/000, Jumo
7 In Stock
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£ 138.70
RS PRO
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222-8218, RS PRO
845 In Stock
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£ 5.68
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£ 5.56
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222-8224, RS PRO
655 In Stock
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£ 5.57
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222-8240, RS PRO
474 In Stock
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£ 7.85
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£ 7.47
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£ 7.30
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2455RP-91000440, Honeywell
208 In Stock
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£ 21.70
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£ 21.09
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£ 19.93
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2455RP-91000435, Honeywell
422 In Stock
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£ 18.44
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£ 17.90
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£ 16.98
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2455RP-91000431, Honeywell
29 In Stock
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£ 22.00
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£ 21.31
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£ 20.26
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55.34022.020.DIST, EGO
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£ 110.49
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New Items
New items
603070/0001-6-016-000-25-0-00-15-00-00-000-00-17, Jumo

603070/0001-6-016-000-25-0-00-15-00-00-000-00-17, Jumo

heatTHERM-AT — Thermostat Switch points adjustable from outside PUSH-IN connection technology shortens installation time Stable switch point position through ambient temperature compensation Protection rating IP54 Description: Probe Process connection: RS order no.: Temperature regulator TR 6 x 87 mm Protection tube U 4, brass, nickel-plated 467-012 Temperature monitor TM 6 x 87 mm Protection tube U 4, brass, nickel-plated 467-157 Safety temperature monitor STM 6 x 60 mm Protection tube U 4, brass, nickel-plated 467-153 Safety temperature limiter STL 6 x 60 mm Protection tube 1/8", 8 x 100 mm, brass, nickel-plated 467-018 Room thermostat temperature regulator TR - Helix sensor 467-028 Room thermostat temperature regulator TR - Helix sensor 467-024
New items
2455R 9082-463 L110C, Honeywell

2455R 9082-463 L110C, Honeywell

Bi-Metallic Thermostat Snap action bi-metallic disc operates an SPST contact which is electrically isolated from the mounting bracket. All types reset when the temperature falls to nominally 15° below operating temperature. •Phenolic body with stainless steel end cap. •1/4in tab termination. •Contacts are rated to 250 Vac 10A with a maximum contact resistance of 50 mΩ. •Dielectric strength of 2000 Vac. •N/C types open on temperature rise. •N/O types close on temperature rise. Approvals UL recognised component, CSA Certified Thermal Switches
New items
603021/02-2-064-30-2000-40-10-00-00-000-00-6/000, Jumo

603021/02-2-064-30-2000-40-10-00-00-000-00-6/000, Jumo

ATHf-2 – Temperature monitor with changeover contact Switching point adjusted on inside Ø sensor: 6 mm (cylindrical probe) Capillary conduit length: 1000 / 2000 mm Protection rating: IP54 Max. Switching current: 10 A / 230 V
New items
602010/70-043-00-2000-20-10-00-00-000-00-6/000, Jumo

602010/70-043-00-2000-20-10-00-00-000-00-6/000, Jumo

ETH series panel-mount thermostat ETHF-70 series safety temperature thermostat without breaking capacity. With break contact and manual reset. Smooth round stainless steel probe. Probe diameter: 6 mm Probe length: 77 mm Capillary length: 2000 mm Adjustment range: +20 → 150 °C Contact type: N/C Breaking capacity: 10 A 230 Vac
New items
603026/0202-1-043-30-0-00-20-13-46-100-15-6/000, Jumo

603026/0202-1-043-30-0-00-20-13-46-100-15-6/000, Jumo

ATHs - Surface-mounting twin thermostat For controlling and monitoring thermal processes Surface-mounting twin thermostats consist of two separate measuring and switching systems They work on the principle of liquid expansion; a microswitch serves as an electrical switching element Version with rigid shaft Protection rating IP54 Description: Probe Process connection: RS order no.: Temperature controller/monitor TR/TW 15 x 150 mm U G1/2 467-175 Temperature monitor/monitor TW/TW 15 x 120 mm U G1/2 466-986 Temperature monitor/monitor TW/TW 15 x 100 mm U G1/2 467-034 Temperature controller/safety temperature monitor TR/STW 15 x 150 mm U G1/2 466-996 Temperature controller/safety temperature limiter TR/STB 15 x 150 mm U G1/2 467-169 Temperature controller/safety temperature limiter TR/STB 15 x 150 mm U G1/2 467-163
New items
2455RP 9100-432 L30C, Honeywell

2455RP 9100-432 L30C, Honeywell

Basic Bi-MetallicThermostat PPS Ryton body with steel end cap Electrical terminals parallel to the mounting face and a floating steel bracket to ease mounting and increase temperature tolerance N/C types open on temperature rise, N/O types close on temperature rise 1/4in. tab termination Contacts are rated to 250Vac 10A with a maximum contact resistance of 50mΩ Dielectric strength of 2000Vac Note The contacts are NOT silver plated and are unsuitable for use with low current dc applications Thermal Switches
New items
2455RP 9100-445 F90C, Honeywell

2455RP 9100-445 F90C, Honeywell

Basic Bi-MetallicThermostat PPS Ryton body with steel end cap Electrical terminals parallel to the mounting face and a floating steel bracket to ease mounting and increase temperature tolerance N/C types open on temperature rise, N/O types close on temperature rise 1/4in. tab termination Contacts are rated to 250Vac 10A with a maximum contact resistance of 50mΩ Dielectric strength of 2000Vac Note The contacts are NOT silver plated and are unsuitable for use with low current dc applications Thermal Switches
New items
733-4723, RS Pro

733-4723, RS Pro

Adjustable Capillary & Safety Limit Thermostats Capillary Thermostats which operate from a remote bulb linked with a 1m capillary, changeover contacts (SPDT) enable use with both heating and cooling loads. Supplied with chrome mounting bezel and knob. Safety Limit Thermostat (stock no. 733-4735 ) with manual reset and positive cut-off activated when capillary breaks (SPDT contact) Suitable for domestic/commercial applications Capillary length 1000 mm Min. capillary bend radius 5mm Temp. rate of change 1°K/min Contact rating (SPDT) 250 Vac 16 A Body dimensions W x L x H 32 x 44 x 36 mm Overall size (excluding capillary) 32 x 44 x 60 mm
New items
603021/70-2-064-00-2000-40-10-00-00-000-00-6/000, Jumo

603021/70-2-064-00-2000-40-10-00-00-000-00-6/000, Jumo

ATHf-70 - safety temperature limiter With break contact and lock-out Switching point adjusted on inside
New items
222-8236, RS PRO

222-8236, RS PRO

RS PRO Bimetal Thermostat Switch Features and Benefits: This RS PRO bimetallic thermal control switch is designed for temperature control and regulation in a wide range of electrical products like coffee machines, smoke detectors, heating systems, boilers and much more Each thermostat is inch (12.4 mm) in height, making it a compatible replacement part for a wide range of appliances or for new installations and designs that require temperature sensors These snap-action thermostats are available in automatic or manual reset options, phenolic, PPS or ceramic housings which offer dustproof performance, and a variety of mounting brackets and terminal options In addition to this, the switches offer a rapid response time to temperature changes due to the low mass of the disc and the compact size of the actual thermostat switch Available as normally closed and normally open types, with thermally and electrically isolated contacts RoHS, REACH, UL/cUL and ENEC17 approved Applications: Sensing and instrumentation HVAC Automotive and industrial Computers and computer peripherals Why RS PRO?
New items
602021/0005-027-000-25-1000-40-10-00-00-000-00-6, Jumo

602021/0005-027-000-25-1000-40-10-00-00-000-00-6, Jumo

Temperature Limiter Thermostat This range of capillary thermostats monitor thermal processes as temperature controllers or as temperature limiters utilising a microswitch reacting to fluid expansion as the switch. Temperature ranges from 0 to 500°C 1 x SPST switching contact Switching differential 2.5% (4% for RS stock No. 357-7840 ) Switching point adjustable with screwdriver Probe diameter 6mm (type 150/200/300°C) 8mm (type 500°C) Capillary conduit length 1000mm Max. switching current 16A/230V Adjustment shaft 6mmØ
New items
603021/01-1-043-30-0-00-20-13-46-100-8-6/000, Jumo

603021/01-1-043-30-0-00-20-13-46-100-8-6/000, Jumo

Surface Mount Thermostat with Rigid Capillary The surface mount thermostat works on the principle of volume expansion, if the temperature of the filling medium inside the probe increases the volume increases which results in the elevation of a diagrapm that triggers a microswitch. IP54 Rated 1xSPDT switching contact Temperature control or temperature monitoring functions Differential of 3-4% Type Control Range Immersion Tube Dimensions (mm) Connection ATHs-1 0 → 100°C 8 X 120 U G1/2 ATHs-1A 20 → 150°C 8 x 100 U G1/2 ATHs-2 0 → 100°C 8 x 120 U G1/2 ATHs-2A 20 → 150°C 8 x100 UZ G1/2 Max. switching current 10A Note With the ATHs-1 the switching point can be adjusted from the outside, with the ATHs-2 the switching point can be adjusted on the inside. U= Screw in pocket, UZ=screw in pocket with extension
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