About us

Worldwide Leaders in Safety Control Products

When it comes to safety system controls, SigmaHLR leads the way in providing the most reliable, innovative, high quality products.

Innovative

Providing the industry with complete innovative solutions for pressure safety control.

Reliable

A proven product line with a reliable track record.

Consistent

All products subject to thorough testing procedures for 100% compliance.

Quality

SigmaHLR is an ISO 9001:2015 certified company.

what we do

The Industry’s Top Safety Control Products

Over the past five decades, our line of SigmaHLR products has set the industry standard for dependable pneumatic and hydraulic instruments. Serving the oil and gas industry worldwide, we offer proven products, quick delivery and the highest level of customer service.

Pneumatic

Pressure Sensors, Reset Relays, Controller Units, Relief Valves, Velocity Checks

Sand Probes

Pneumatic and Electric Options, Flowline and Panel Mount, Standard Pipe Sizes and Custom Applications Available

Hydraulic

Hydraulic Interface Valves, Quick Exhausts Regulators and Accumulators

Our product offering

Setting the Benchmark 
in the Industry

Each product has been thoughtfully designed with precision and attention to detail, ensuring that it perfectly aligns with the diverse needs and preferences of our esteemed customers.

Accessories

Auto Relays

Check Valves

Controller Unit

Manual Relays

Fusible Devices

Specialty Valves

Hydraulic Interface Valves