Level Sensors & Switches

TH-800 Single-Point Level Switch

Part Number: 57143
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PRODUCT DESCRIPTION:

TH-800 Series Single-Point Level Switches incorporate level monitoring and a temperature switch in a single unit. A single-setting temperature sensor is in the bottom of the stem. TH-800 are ideal for use in oils and water and are intermediate in size.

  • Ideal in Oils and Water
  • Monitoring and Temperature Switch in a Single Unit
  • Intermediate Size

Features

  • Ideal in Oils and Water
  • Level Monitoring and Temperature Switch in a Single Unit
  • Intermediate Size  
SKU
57143
Model
TH-800
Sensor Type
Float Type
Primary Material Of Construction
Alloy
Wetted Materials
Brass, Buna N, Berylium Copper
Stem Material
Brass
Float Material
Buna N
Float Diameter
1 1/4"
Actuation Level
1 1/2"
Min. Liquid SG
0.75
Maximum Pressure
150 psi
Minimum Temperature
-40°F
Maximum Temperature
230°F
Mounting Size
1/4" NPT Male
Mounting Style
Vertical
Electrical Termination
24" Long, 18 AWG, Polymeric Leads
Switch Type
SPST (20 VA)
Switch Operation
Normally Open (Reversible)
Input
N/A
Output
N/A

Reed Switch Protection

Format .pdf
Size 56 KB

Gems Sensors Instructions, Level Switches

Format .pdf
Size 553 KB

Gems Sensors Catalog, Specialty Switches

Format .pdf
Size 4 MB
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Is there a minimum current flow requirement for a standard 20VA reed switch?

Yes, very low currents (< 5ma) can prevent “cleaning” of the contacts or not have enough energy to maintain low contact resistance. 5ma is likely a good minimum for our standard 20 VA switch. But you also want enough voltage. Approximately, 5V, 5ma is a good minimum. For low current switching we recommend a 10 VA reed switch which can better handle lower loads. (1ma for example).

What is the life expectancy of a reed switch?

A reed switch is extremely rugged and designed to operate reliably for many years, under ideal conditions, up to about 2 million cycles. To achieve maximum service life, reed switches benefit from protected electrical supply.