The Insertion style flow switch includes a sensor probe assembly which is inserted into the process conduit to allow the gas to flow across the sensors. The insertion style thermal mass flow switch probe assemblies may be inserted into any suitable flow section, pipe, duct, etc.
Insertion flow switches are available with 1/2″, 3/4″, or 1″ OD probes and may be installed with pipe fitting connections or user-supplied bored through tube fittings. Tube fittings and ball valve retractor assemblies, with or without a mounting flange, are also available from the factory as options. The tube length must be specified upon ordering. For other probe diameters and lengths, please consult the factory.
All of EPI’s flow switches have two single-pole, double-throw relays for Hi/Hi, Lo/Lo and Hi/Lo capability. The contact closure is 5 amps @ 24 VDC and 115 VAC. Two LEDs are provided for verification that the Hi or Lo alarm has been triggered. The standard configuration has 316 Stainless Steel wetted parts (Hastelloy & Monel are also available) for a rugged, cleanable instrument designed for use in applications where corrosion, abrasion, high pressure or rough handling may be expected