New-Flow offers a large variety of products for measurement and control of temperature, pressure, flow, level, and valve.
For "Non-corrosive" liquid fluid
SPDT micro switch
3A/250VAC, 3A/30VDC, 0.4A/125VDC
Female ½", ¾" G, NPT, and M20xP1.5 or M25xP1.5 available
