M5’s field instruments provide monitoring and control with precision. Our high quality controllers are kept in stock so you are never left stranded.

m5 contollers

The Model 101 Liquid Level Controller was designed specifically for the oil and gas industry. Its design and low cost make it the choice of operators for reliable service in a variety of applications. These all purpose units are available with a variety of displacer materials, arm lengths, and pilot actions to suit all of your needs.


  • Non-bleed Pilot–The 101 Liquid Level Controllers can be fitted with either snap pilot for on/off service or a throttle pilot for proportional service. The controller can be quickly and easily converted to either.
  • I Field Reversible–The Model 101 design makes reversing the controller action simple and re quires no additonal parts or special tools.
  • Liquid Interface Control–The 101 Liquid Level Controllers are well-suited for liquid-liquid interface detection.
  • Displacers–M5 offers a variety of displacer materials and designs to satisfy your application requirements. Standard material offerings are PVC, Acrylic, and 316 Stainless Steel.


Body: Zinc plated steel

Case and Coveri aluminum

Pilots: Aluminum with SST Internals

Gauges: Bronze, 316 SST (optional), 316 SST LF (optional)

Threaded: 2” MNPT, 6,000 PSIG rated (414 bar)

Service: Horizontal or vertical (vertical hanger included standard)

Flouroelastomer Sealsi -20 to 400° F (-29 to 204°C)

Pilot: Snap (on/off service), 0-30 psig output or Throttle (proportional) 3-15 or 6-30 psig output

Shaft and Bearing Blocksi 316 SST

Displacers: PVC (5000# rated), Acrylic (5000# rated), 316 SST (2000# @ 180F)

Temperature Limitsi Fluoroelastomer/PVC -20 to 140 °, Flouroelastomer/Acrylic -20 to 200°, Flouroelastomer

Temperature Limitsi Flouroelastomer/PVC -20 to 140 degrees, Flouroelastomer/Acrylic -20to