For tank farm operators, refinery engineers, wastewater plant operators, and chemical processors who require dependable level monitoring, pump protection, and overflow prevention, the Omnitrols 616 and 716 Top Mounted Level Control Switches are robust, displacer-actuated devices. Using stainless steel displacers for long service life, these switches are ideally suited for corrosive, hazardous, or high-value products. Unlike side-mounted or welded designs, these top-mounted switches allow for straightforward tank access and maintenance while offering precise actuation, rugged construction, and long-term reliability.
Stainless steel displacers are highly resistant to aggressive chemicals and mechanical wear, ensuring a long service life and reliable operation in elevated temperatures.
Engineered to protect critical assets by providing dependable actuation to prevent unsafe overfill or damaging pump dry-run conditions.
Flexible design makes the switches suitable for a wide range of applications in both large storage tanks and smaller process vessels.
The top-mounted design simplifies inspection and replacement of displacers and internal components, reducing maintenance complexity compared to chamber-mounted or welded units.
Available with SPDT (Single Pole, Double Throw) or DPDT (Double Pole, Double Throw) contact options for easy connection to control systems, alarms, interlocks, or pump cutout circuits.
| Table Header | Table Header |
|---|---|
|
Mounting |
Top-mounted, 2-1/2″ NPT or ANSI flange (150#-1500#) |
|
Actuation |
Magnetic snap-action switch mechanism |
|
Switch Types |
SPDT, DPDT micro switches |
|
Displacer
|
Stainless steel weighted sinking displacer |
|
Cable Length
|
10’ standard; up to 75’ (600 series); 40’ (700 series) |
|
Specific Gravity Range |
0.70 – 2.0 (±0.2 variation) |
|
Temperature
|
Up to 500°F (material dependent) |
|
Differential Range
|
2.5″ to full cable travel |
|
Certifications |
UL, CSA |
|
Housing |
WR or Explosion-Proof/Vapor Proof/Rain Tight |
Have a look at the flyer to get all the tech specs and product features.
Brochure
Read the manual for detailed information and instructions.
Manual
Check out a sample cert from our calibration lab.
Certificate
If you have a question that we have not covered then just get in touch and we’ll be happy to help.
We have tried to answer the most common questions we are asked here.
In a top-mounted configuration, the entire switch assembly, including the displacer, can be accessed and removed from the top of the tank. This eliminates the need for side-entry work or extensive scaffolding and is generally considered easier and safer for inspection and replacement compared to accessing units mounted deep inside the tank or on the side chamber.