Murphy L971 Level Switch

The L971 Level Switch is designed for Ingersoll-Rand Type 30, Type 40 and ESH compressors, yet it can be adapted to fit other compressors that have an inspection plate extending below normal operating oil level. It installs with minimal downtime and has a two-year limited warranty.

  • Durable Low Level Switches.
  • Installs with Minimal Downtime
  • Technical Data

Murphy SKU:sc-5425 Category: Tags: , Brand:

Available on backorder


The L971 Series Level Switch detects low oil level in a compressor’s crankcase. As oil level in the crankcase depletes, the float on the L971 switch falls, and when reaching the predetermined limit, it will trip the internal snap-switch sounding an alarm or initiating shutdown.

  • The L971 has a 1/2 NPT process connection and features an explosion-proof enclosure, durable SPDT snap-switch and rigid polyurethane foam float. A 304 stainless steel float is available on certain configurations.

Additional information

Weight1.2 kg

Operating Temperature Range: -15 to 275°F (-26 to 135°C) Maximum Working Pressure: 30 psi (206 kPa) [2.06 bar] Switch Rating: 4 A @ 250 VAC Case: Aluminum (explosion-proof) Mounting Adaptor: Brass Floats: Rigid polyurethane. 304 stainless steel available on L971-C only Other Wetted Parts: 303, 304, and 316 stainless steel O-Ring Seals: Viton and Buna Process Connection: 1/2 NPT Hazardous Location Rating: UL and CSA listed for Class I, Groups C & D; Class II, Groups F & G. Enclosure Type / Ingress Protection Rating: IP66 per IEC 60529. Conduit Connection: 1/2 NPT Wire: 18 AWG (0.75 mm2) Shipping Dimensions: 8-1/4 x 4-1/4 x 4-1/2 in. (210 x 108 x 114 mm)