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. 455-3700
Mfr. Part No.CM1421-0
BrandAssemtech
R 100.56
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. 455-3693
Mfr. Part No.CM1320-0
BrandAssemtech
R 38.42
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. 335-485
Mfr. Part No.S1017
BrandAssemtech
R 276.64
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. 235-7617
Mfr. Part No.CM1706-1
BrandAssemtech
R 136.81
Each
units
6 ° 250 mA 60V - Wire Lead 15 mm 11.12mm - - -37°C +100°C 11.12 x 15.37 mm
RS stock no. 361-5043
Mfr. Part No.S1116
BrandAssemtech
R 156.68
Each
units
35 ° 12.5 A 240V - Wire Lead 30 mm 226.5mm - - -20°C +105°C 226.5 x 30 mm
RS stock no. 361-5166
Mfr. Part No.S1269
BrandAssemtech
R 55.36
Each
units
4 (Vertical) °, 10 (Horizontal) ° 500 mA 110V - - - - 30mm 20mm 7mm -20°C +70°C 30 x 20 x 7 mm
RS stock no. 235-7572
Mfr. Part No.CM1800-1
BrandAssemtech
R 52.18
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