The result is a maintenance-friendly, flanged chamber level switch that provides predictable HI/LO or pump control points in a compact, rugged design—ideal for pressurized and safety-critical applications across upstream, midstream, downstream, and industrial process facilities.
Two setpoints in one chamber — ideal for HI/LO alarms or pump start/stop.
Standard ~4" gap adjustable from ~2–6" depending on model size.
Ensures accurate trip points for your liquid — no field tuning required.
Available across multiple ANSI pressure classes for ASME-rated vessels.
Verified chamber integrity prior to installation.
Carbon steel, 304, or 316 stainless-steel chambers with graphite displacers for temperature and chemical resistance.
UL & CSA hazardous-location approvals for industrial and refinery environments.
No electronics or drift — pure mechanical reliability.
The Omnitrol 764 / 766 / 768 (F) series offers dual-actuator mechanical displacer level switching in a flanged chamber body, providing two independent switch points without two nozzles or complex system plumbing.
Ideal where:
The chamber mounts externally to a pressurized vessel or bypass column and can be isolated for service without breaking the pressure seal to the tank.
Choose model 764F / 766F / 768F depending on switching gap and chamber body size.
| Parameter | Specification |
|---|---|
|
Models |
764F, 766F, 768F (dual-actuator, flanged)
|
|
Switching Points
|
Two independent trips; nominal 4″ spacing (adjustable ≈2–6″)
|
|
Specific Gravity
|
Up to 1.4 SG — factory calibrated |
|
Chamber Material
|
Carbon steel, 304 SS, 316 SS |
|
Displacer Material
|
Graphite, 304SS, 316SS |
|
Flange Class
|
ANSI 150 / 300 / 600 |
|
Temperature Capability
|
Per material selection; suitable for hot service |
|
Switch Output
|
SPDT / DPDT microswitch options |
|
Enclosures
|
Weather-resistant, Explosion-Proof /Rain -Tight |
|
Certifications
|
UL & CSA Approved |
|
Installation
|
Side-mounted flanged chamber |
|
Service
|
Pump control, HI/LO alarms, high-high safety trips |
|
Variants
|
Also available in W (welded) body versions |
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.
When you need two setpoints in one nozzle — for HI/LO alarms or pump start/stop.
The spacing and chamber size — select based on desired differential and vessel dynamics.
No — it ships factory-calibrated to your specific gravity and switching differential.
Yes — available with UL/CSA explosion-proof approval.
Specify 76xW for welded-chamber configurations; use 76xF for flanged.
Yes. The 764F/766F/768F features a configurable switching gap (approx. 2–6 inches), which is the difference between the high and low setpoints. This adjustability allows engineers to deliberately set a wider differential to prevent the pump from “short-cycling” during process surge conditions.
Yes. The unit is factory-calibrated to the specified SG of the fluid. While the switch will work across a range, the mechanical design ensures that the buoyant force needed for actuation remains consistent. By knowing the fluid’s SG, the factory ensures the physical switching points are accurate, eliminating a major source of error common in level switches.