Provide operating control and automatic high limit protection for vapor heating systems with pressures up to 4 psi (27.6 kPa). All models have Microswitch snap switches to open or close a circuit on a pressure rise.

Honeywell line voltage pressure controller that provides automatic operating control, automatic limit protection, manual reset limit protection, and 4-20ma modulating firing rate control for pressure systems up to 300 psi.

Low cost digital multimeter with autoranging, data hold, continuity test, diode check, count resolution, dual molded plastic housing and temperature function.

Model ST-9919 Weatherproof True RMS Digital Multimeter is released by TEK Instrument Company, a renowned online distributor of Instrumentation, Controls and Gauges.