Series 7000 Insertion Thermal Mass Flow Switch


Insertion flow switches are available with 1/2″, 3/4″, or 1″ OD probes and may be installed with compression fittings. Optional flange sold with compression fitting (insertion probe inserted into compression fitting, flange bolted to process line connection.


Series 7000 Flow Switch

7240 – 1/2″ diameter probe, max length 36″
7260 – 3/4″ diameter probe, max length 60″
7280 – 1″ diameter probe, max length 84″

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

Additional information

Product Line



No Agency Certifications

Signal output
Relay contact, high & low,
6 Amp @ 24 Volts DC or 250 Volts AC (Class “A” Insulation)

Event Relay Rating one with Frequency or two, 1 Amp @ 30Vdc (33W)

Trip point accuracy
+/‑ 1.0% of Set Point

+/‑ 0.5% of Range

Sensor response time (Metal)
1 second

Signal response time
Set to 1 second

Turn down ratio
100:1 minimum

Electronics temperature range
0‑50°C (32‑122°F)

Gas temperature range
0‑200°C (32‑392°F)

Gas temperature effect
.01% /°C for gas

Pressure rating maximum:
500 PSI

Power requirements
User supplied 24 VDC, @ 250mA Max.
120 VAC 50/60 Hz (optional)

Flow switch enclosure
NEMA 4, Class 1, Div 1 Groups B, C and D

Wetted materials
316SS, ceramic, glass, epoxy

NIST traceable calibration
Optional for Gas

Calibration Standard (Gas)
70 °F & 29.92″ Hg
(Air = .075 lb./cubic foot)

NOTE: Specifications subject to change without notice.