For refinery operators, chemical plant engineers, wastewater utilities, terminal automation teams, and EPC designers who require dependable point-level control, pump automation, and overfill protection in harsh industrial environments, the Omnitrol 613/713 Series with porcelain displacers offers proven magnetic displacer switching, exceptional chemical resistance, and safe operation in hazardous areas.
Unlike floats, reed switches, or capacitive sensors that fail in foamy, dirty, or coating-prone liquids, the Omnitrol 613/713 uses buoyancy-based displacers and a snap-action magnetic mechanism for accurate, drift-free switching unaffected by turbulence, vapor layers, solids, or buildup.
The 613 model provides a single switching point, while the 713 delivers dual independent alarm points—ideal for pump start/stop or API 2350 high-high level shutdown systems. Porcelain displacers offer a unique value for corrosive or fouling environments where stainless steel may corrode and graphite is unnecessary.
Ideal where stainless steel may corrode or foul, and graphite is not required.
Positive latching with no chatter or false trips in turbulence.
Configure for pump start/stop, high-high alarm, or redundant level safety logic.
Suitable for tanks, sumps, bypass columns, and external cages.
Suitable for Class I Groups B, C, D and Class II Groups E, F, G installations.
Factory-set for specific gravity — not affected by pressure or temperature cycles.
Designed for extreme applications — up to 1500PSIG and 400 °F depending on configuration.
Tested for tank overfill protection and emergency shutdown compliance.
The Omnitrol 613/713 Porcelain Displacer Series uses Archimedes’ principle to sense level changes. As buoyancy shifts, a sealed porcelain displacer moves, transmitting force to a magnet assembly that triggers a snap-action microswitch—with no process contact to the switch enclosure.
Porcelain displacers provide excellent chemical resistance and anti-fouling properties, making them ideal for solvents, corrosive liquids, caustics, and water-based processes. They fill a critical niche between stainless steel displacers (susceptible in certain chemical duties) and graphite displacers (designed for extreme service but higher cost).
The dual-point 713 model supports redundant high alarms or pump control, while the 613 is perfect for single high or low level protection. With no electronics exposed to process media, the system delivers long life and reliable performance where electronic level devices struggle.
| Parameter | Specification |
|---|---|
|
Technology |
Magnetic displacer, buoyancy-actuated |
|
Models
|
613 (single point) / 713 (dual point) |
|
Displacer Material |
Porcelain (chemical-resistant, anti-fouling) |
|
Isolation Tube |
304 or 316 SS |
|
Switch Types |
SPDT or DPDT micro switch |
|
Mounting |
Top mount, 2 ½” NPT or Flanged Connections |
|
Pressure Rating |
Up to ~1500 psi (103 bar) |
|
Temperature Rating
|
Up to ~400°F (204°C) depending on configuration |
|
Housing Options |
WR or Explosion-Proof / Vapor-Proof/Rain Tight |
|
Conduit Entry |
¾″ NPT |
|
Certifications |
UL & CSA Approved |
|
Maintenance |
No calibration; periodic inspection recommended |
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.
Porcelain resists chemical attack and coating, offering the ideal balance where stainless may corrode and graphite offers more ruggedness than needed (higher cost).
The magnetic snap-action mechanism uses internal magnets to lock the switch contacts into their ON/OFF position. The process liquid must exert enough buoyant force to physically overcome this magnetic latch. This design makes the switch highly immune to minor agitation, surface foam, or turbulence that would cause traditional float switches to chatter or produce false alarms.
Yes. The Omnitrol 713 model is the dual-actuator version, meaning it houses two independent switching mechanisms that can be set at different levels. This allows the device to manage both a low-level pump-off setpoint and a high-level alarm setpoint simultaneously using a single tank penetration.
Use the 713 for dual alarms or pump control (start/stop or high-high). The 613 is for a single alarm or control point.
Yes — displacer technology is immune to foam, turbulence, and vibration.
Yes — high-pressure isolation tube options support pressurized and boiler service.
Yes — available with Class I & II Div 1 approvals for hazardous process environments.
Refineries, chemical plants, terminals, power plants, and wastewater facilities—especially where chemicals, solvents, or fouling media are present.