Pump Suppliers & Distributors

Pump Flow Switch

Our Thermal Mass Probe Flow meter is engineered to provide accurate flow rate measurements for gases, liquids, or slurries in challenging environments such as stacks, irregularly shaped lines, and process ducts. What sets us apart is our innovative design featuring a model with no apertures prone to clogging or wear distortion.

FS16 Flow Switch

Increased features, performance, and versatility are available in the FS16 Flow Switch. The FS16 provides visibility to the flow rate while providing alarm set Thermal Instrument Model # 600-9/FS16 Dual Alarm Flow Switch. Pictured with 1/2″ MNPT Pipe Connection for Water Flow. Flow Indicator @ 40% of Full-Scale Flow Rate. points to help monitor your critical processes. Additionally, the FS16 can be configured to deliver fluid temperature across a 4-20 mA output. As usual, any instrument ordered from Thermal Instrument Company is designed to perform in industrial applications.

We build all of our flow elements out of 316SS but offer other exotic materials as necessary dependent upon application need. Hastelloy, Tantalum, Monel, and others have been used in the harshest of flow applications. Our circuitry is housed in a cast aluminium enclosure that allows the end user to modify set points as necessary, quickly and easily. The instrument can be set up to monitor liquid or gas applications in line sizes as small as 1/4″ OD to large duct or pipelines. If your process requires Flow / No Flow or the ability to set up a Low Flow Rate Alarm or High Flow Rate Alarm, or both, you have found the right switch.

Phone: +1 (318) 614-3971

3928 US-80, Rayville, LA 71269, United States
4600 FM-307 Midland, TX 79706 United States


Key Features of Model FS16:

  • 10 Bar LED Flow Rate Indication
  • (2) SPDT 10 Amp Relay Alarms Standard or (1) 10 Amp DPDT Relay Alarm (optional)
  •  4 – 20 mA Temperature Output Available
  • Adjustable Set Points & Hysteresis
  • Available as both an in-line (Model # 600-9) or Insertion Probe (Model # 62-9)

Common Applications:

  • Protecting Critical Process Equipment
  • Leak Detection
  • Flow / No Flow of Liquids or Gas
  • Pressure Relief Valve Monitoring
  • Water Treatment Systems
  • Water Cooled Equipment

Advantages of Thermal Instrument Mass Flow Switches:

  • No Moving Parts
  • Wide Turndown
  • Repeatable
  • Sensors Protected from Passing Fluid
  • Built for Industrial Applications
  • Multiple Process Connections
  • Exotic Materials & Sanitary Surface Finishes Available

Key Features of Model FS16:

  • (1) Form C (SPDT) 5 Amp Relay
  • Field Adjustable Alarm Set Point
  • Field Adjustable for Trip High / Trip Low
  • Integral or Remote Mounted Circuitry 
  • All Welded 316SS Body Standard
  • Special Materials Available for Corrosion or Abrasion Resistance
  • In-line or Insertion Probe Option
  • Unobstructed Flow Path with Negligible Pressure Drop on Model # 600-9  
  • Numerous Process Connections
  • 250 to 500F Service
  • Pressure & Temperature Compensated
  • Protected Precision RTD Sensor
  • Explosion-Proof Construction
  • Calibration Chart Provided
  • Input Power 115/230 VAC or 24 VDC

Key Features of Model FS16:

The durability, accuracy, versatility, and ease of use of this mass flow switch make it the economical choice for your process flow application. The electronics are built into a cast aluminium condulet which can be mounted as an integral part on the Model 62-9 and 600-9. Allowing a plant technician to accurately field set the trip point by adjusting the potentiometer. Using a voltmeter, the technician can then compare trip point voltage with the calibration voltages given on calibration chart provided with each meter. Trip high/trip low function can be field enabled with a simple jumper change.