Mercury Tilt Switches

Mercury Tilt Switches
A mercury tilt switch is an electrical switch that opens and closes a circuit what a small amount of liquid mercury connects with metal electrodes. When tilted in one direction the switch is either open or closed, and then in the opposite when tilted in the other direction.
Due to the fact that mercury is a poisonous metal, any devices containing mercury must be treated as hazardous. With current RoHS restrictions, mercury has been eliminated in most modern applications.
Advantages
• The contacts are enclosed to stop oxidation
• Can be used in hazardous locations
• Low resistance
• Quiet operation
Applications
Mercury tilt switches are commonly used in older style thermostats used to turn a heater or air conditioning on or off. Another use is in construction equipment and lift vehicles by being used as a rollover warning when operating in rugged terrains.
Vending machines also include tilt switches and are used to activate an alarm when someone tries to rock or tilt the machine.

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Description Price Differential Angle Maximum Current Maximum AC Voltage Maximum DC Voltage Terminal Type Contact Resistance Diameter Length Width Depth Minimum Operating Temperature Maximum Operating Temperature Dimensions
RS Stock No. 344-883
BrandRS PRO
£7.63
Each
Units
10 ° 1 A 220V - Cable 300mΩ - 347mm 12mm 11mm -20°C +70°C 12 x 11 x 347 mm
RS Stock No. 335-491
Mfr. Part No.S1016
BrandAssemtech
£11.43
Each
Units
15 ° 10 A 240V - Wire Lead 300mΩ 13 mm 196.5mm - - -20°C +70°C 196.5 x 13 mm
RS Stock No. 335-485
Mfr. Part No.S1017
BrandAssemtech
£13.44
Each
Units
15 ° 19 A 240V - Wire Lead 300mΩ 22 mm 210.5mm - - -20°C +70°C 210.5 x 21.5 mm
RS Stock No. 455-3693
Mfr. Part No.CM1320-0
BrandAssemtech
£2.07
Each
Units
10 ° 250 mA 120V - Wire Lead 6 mm 27.3mm - - -37°C +100°C 27.3 x 5.94 mm
RS Stock No. 455-3700
Mfr. Part No.CM1421-0
BrandAssemtech
£3.46
Each
Units
45 ° 500 mA 120V - Wire Lead 30mΩ 10 mm 21.3mm - - -37°C +100°C 21.3 x 9.5 mm
RS Stock No. 235-7572
Mfr. Part No.CM1800-1
BrandAssemtech
£2.59
Each
Units
5 ° 100 mA ac, 200 mA dc 120V 120V PCB - 10.08mm 7.14mm 4.62mm -37°C +100°C 10.08 x 7.14 x 4.62 mm
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