mercoid switch for sale, brand-new and used.

Water level control, cast iron chamber, SPST mercury switch, opens on increase. Heavy Duty, Cast Iron Chamber Designed for boiler applications, the M

**PLEASE READ ENTIRE DESCRIPTION** VINTAGE MERCOID SWITCH "TYPE PQ #70182" WITH WESTERN ELECTRIC TAG / NAME PLATE MOUNTED TO WOOD BASE PLATE, WHICH IS 7 3/4" SQUARE x 3/4" THICK. THIS IS A VERY UNIQUE ITEM VERY GOOD LOOKING OVERALL CONDITION, UN-TESTED

Thanks for looking this Mercoid DA31-153-9 is standard equipment for the Joslyn Clark and Sylvania Electric fire pump controllers, Because of its universal contacts it will also work with a Metron, Firetrol ,Cuttler hammer andMaster control systems electric and diesel fire pump controller. This particular switch was taken out of a working Metron fire pump controller that was replaced due to an upgrade.

This is a working Mercoid pressure switch was removed from a Master DC diesel fire pump controller that was taken out of service due to an upgrade, Has the bracket to back pan mount in a Master DC ,DCB, DCFRA or DCFB Diesel fire pump controller.I tested the switch with air and gauge switch is in range. Will also work with a Metron Diesel or electric as well as firetrol.

Welcome Dwyer Instruments Inc. Mercoid controls pressure switchModel # DAF-31-156-3A PSIG range looks to be 1/8 to 20 psigunit is complete with instructions for installation. Thanks for looking.

Up for Buy it now or Best offer is Antique Rare Mercoid Liquid Mercury tube Relay Switch Electronic This unit is in working condition This is from an estate of a 90 year old retired electrician. I have 3 of these 2 have metal mercoid Covers 1 does not. the last one will be sold without the cover...

This is a MERCOID DWYER CONTROL DA-31-153-7 PRESSURE SWITCH SPDT 5-150PSIG 120/240VAC/DC from unused inventory!

Mercoid DA31-153-9 Pressure switch JUST REMOVED FROM SERVICE, WORKING AT TIME OR REMOVAL

It is being sold in working condition. We are offering a 14 day money back guarantee! This item will be shipped promptly following payment.

Thanks for looking this Mercoid DA31-2-9 works with Metron, Firetrol ,Cuttler hammer andMaster control systems electric and diesel fire pump controller. This particular switch was taken out of a working Metron fire pump controller that was replaced due to an upgrade. The switch has been tested and verified to be in working order, the switch has not be subjected to freezing temperatures.

Mercoid Control DA 21-3 R 5S Pressure Control Switch FREE SHIPPING Orders are processed and shipped within 24Hrs of confirmation of payment

The glass is missing from this unit as pictured. This item has been fully tested by our tech department and is in good working condition. Item is guaranteed non-DOA and is covered under our 14-day return policy.

Mercoid PR-153-P2 Limit Control T16V-S24245401 Pressure switch NEW The Item NEW AND WORK NORMALLY This listing is only including items shown in pictures

Mercoid DRF-31-2L-8 Limit Control T14R-S41195001 Pressure switch NEW The Item NEW AND WORK NORMALLY This listing is only including items shown in pictures

MERCOID CONTROL DAH-7041 Mercoid Control Switch Intrinsically Safe B/S/E THIS ITEM IS NEW WE DO NOT HAVE ANY BOXES FOR THESE UNITS AND IN GOOD WORKING CONDITION 100%