Plastics are ideal in highly corrosive water and chemical applications were metallic units are not desired. Economical pricing makes plastic the material of choice for the OEM.
Part #
Reed Switch
Dry State
Price
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LS-209
50 watt; 220v/1.5A max
N.O.*
$15.75
* The dry state can be changed from Normally Open to Normally Closed by inverting the float.