RCM Flow Switches
GP & XP Flo-Gard Inline Flow Switches
A flow switch with reed switches, specifically designed for use in a hazardous location environment (Option 1S2-IS, 1S2-IS-LED or Option 2S2-IS, 2S2-IS-LED). LED's provide viewing at a glance and easy field calibration.
These switches are CSA and ATEX approved and operate in the most demanding environments. RCM flow switches provide an economical solution for equipment protection and automation.
Our general purpose reed switches make or break contacts by detecting the position of a magnet permanently attached to the bellow.
Standard Features
- Independently adjustable Reed Switches for precise setpoint control.
- Single-Pole Double Throw (N.O. / N.C.) contacts.
- CSA Approved — Hazardous Location (Option IS) available.
- ATEX EC Type Examination certified.
- LED indicators for at-a-glance viewing and easy field calibration.
- NEMA 4X / IP66 rated enclosure.
- Available in 1 or 2 switch configurations.
- Economical solution for equipment protection and process automation.
Hazardous Location Specifications (Option IS)
Contact Rating
Vmax = 28V, Imax = 110mA, Pmax = 1.2W, Ci = 0uF, Li = 0uH
CSA / NRTLc
AEx ia IIC: Class I, Div. I, Groups A, B, C & D; Class II, Div. I, Groups E, F & G
KEMA
Ex ia IIC: Zone 0, II 1G T4, 0°C ≤ Ta ≤ 50°C
ATEX
EC Type Examination certified
Selecting a Flow Switch
- Flow Range: Select a switch with a maximum flow range greater than the required switch point. Best performance at approximately 50% of maximum flow range.
- Body Size (A): Threaded units with FNPT connections standard; wafer units mount between 150 or 300 class flanges.
- Material (C): 1 = Bronze, 3 = Stainless Steel (316).
- Switches (F): 1S2 = one SPDT switch; 2S2 = two SPDT switches.
- Options (G/H): IS = Intrinsic Safe Approval; LED = Light Emitting Diode (no charge).
Flow Switch FAQ
Common questions about selecting, wiring, and installing RCM Flo-Gard inline flow switches.
Selection & Application
Specifications & Ratings
Installation & Wiring
Have a flow switch application question not covered here?
Our engineering team is available Mon–Fri, 8:30am–4:30pm EST.
Typical Applications
HVAC
Chilled water and condenser water pump flow verification and no-flow shutdown
Fire Protection
Sprinkler system flow detection and alarm triggering
Chemical Processing
Low-flow alarm on cooling water to protect reactors and heat exchangers
Semiconductor
Cooling water flow monitoring on process equipment with auto-shutdown
Food & Beverage
CIP flow verification and pump protection
Power Generation
Bearing cooling water and lube oil flow monitoring
OEM Equipment
Embedded in skid packages for automatic pump protection
Water Treatment
Filter backwash flow detection and process sequencing
Specifications
| Specification | Standard | Optional |
|---|---|---|
| Maximum Pressure | 400 psig (28.1 kg/cm²) | — |
| Maximum Temperature | 212°F (100°C) | 350°F (177°C) |
| Minimum Temperature | -30°F (-34°C) | -80°F (-62°C) |
| Pressure Drop | 5 psig at max flow; 1.2 psig at 50% of max flow | — |
| Housing | Polycarbonate | Aluminum |
| Pressure Cell | Aluminum, hard anodized | — |
| Body | Bronze | 316SS or Monel |
| Bellows | Bronze | 316SS, Monel or Inconel |
| Gear Movement | Bronze | 316SS |
| Setability | ±5% F.S. | — |
| Repeatability | ±1% F.S. | — |
| Hysteresis | 7 to 13% F.S. | — |
| Contact Rating | 3 watts, 100 Vdc max., 250mA max. | — |
| Enclosure Rating | NEMA 4X / IP66 | — |