The M-60X Explosion Proof Flow Switch monitors increasing and decreasing flow. With the ability to monitor low flow ranges from 750 to 1,600 ml/min for water and 25,000 to 55,000 scc/min for air. It utilizes a single moving part which responds to fluid (liquid or gas) flowing within a system. This explosion-proof flow switch is engineered to monitor vital sample flow parameters for instrumentation in process control and inert blanket gases. The fixed set point model will be within 10% of the desired set point when triggered, while all models offer repeatability of 5%. This switch is suitable for a wide range of applications in industrial, biomedical and OEM products. The flow monitors operate only when fluid flow is absolutely established. The M-60X Explosion Proof Flow Switches have the option of standard pre-calibrated set point ranges for immediate use and distribution. These switches come in SPDT configurations and are UL listed, ATEX and IECEX certified.

The operating principle is based on a free floating magnetic piston which responds only to the motion of fluids within the line, not to static or system pressures. In the presence of fluid flow, controlled movement of the piston actuates an external hermetically sealed reed switch thus opening or closing the required signal circuit. This signal can be used to actuate audible or visual alarms as well as relays, or other controls. Piston travel is short which insures low hysteresis. Pressure drop across flows witch varies from 0.035 to 2 psi (at maximum flowrates for air and liquid). Universal mounted units are outfitted with a spring which resets the piston. The spring is held in place using a perforated disc.

Applications include gas panels, hazardous fluid systems, pollution control monitors, gas leak monitors, sample flow monitoring, and purge flows.