Arjay Engineering Ltd.

2851 Brighton Rd, Oakville, Ontario, L6H 6C9 Canada View map
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Arjay Engineering has been designing and manufacturing process and environmental controls for over 30 years. Our main facility is located in Toronto. Support facilities are located in Vancouver and Beijing. Arjay is also supported by a network of product representatives throughout North America and in various regions of the world. In addition to our manufactured products, Arjay is able to provide custom design and engineering services and control panel assembly.

Year established: 1982
Number of employees: 20
Estimated annual revenue: $1,000,000 to $4,999,999

Learn more about our products and services.

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The EC-Gold is a general purpose sensor transmitter for toxic gas detection.

Gas Detectors

Gas detectors for a wide range of applications are available from Arjay Engineering Ltd. Our detectors are used in a wide variety of facilities including refineries, pumping stations, refrigeration rooms, warehouses, and vehicle service bays. Our detectors can be used to monitor concentrations of both toxic and combustible gases in the air. In addition to gas sensors and transmitters, we can provide gas monitors that can simultaneously monitor up to four sensors and control ventilation and alarms. We have extensive experience meeting the needs of industries including petrochemical, utilitie...

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Our level controls offer continuous monitoring of liquids and solids.

Level Controls

We manufacture monitors and controls for both solid and liquid applications including both on/off alarm switches and continuous level monitors and transmitters. They utilize a radio frequency capacitance system that offers accurate readings and low maintenance.  As the level rises or lowers, the probe detects changes in the capacitance field. This type of system features corrosion resistance, no moving parts, and easy set up and calibration. Arjay Engineering Ltd. has been in business since 1982, and we have the technical expertise to supply the optimal level controls for your operations. L...

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Arjay Engineering Ltd. offers level monitors for use in oil water separators.

Oil Water Separators

Arjay Engineering Ltd. offers a variety of monitors and controls for use with oil/water separators. They can provide continuous monitoring of the oil/water interface, and are often used to control pumps, valves and alarms. The features include low maintenance, easy set-up, and robust construction. Our probes can be used in the most demanding applications since they can withstand process temperatures ranging from -60 C to 260 C. We have the experience and manufacturing capabilities to meet all of your requirements. We can also provide custom design and engineering for your specialty applicat...

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The HydroSense 2410 from Arjay Engineering Ltd.

Oil-In-Water Monitors

We offer a range of oil-in-water monitors. They offer an accurate way to test the concentration of dissolved or emulsified oil in water. Most of our monitors use UV fluorescence to measure oil concentration. They direct light energy at a sample flow and measure the intensity of light that fluoresces back from any oils in the sample.  Our unique UV absorbing flow plate provides increased accuracy by maximizing the surface area of the sample flow. They use non-contacting optics and sensors to minimize required maintenance. We have more than 30 years' experience providing reliable monitors for...

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Model AST100T viscometer with display.


A wide variety of viscometers are available from Ajay Engineering Ltd. Our products offer viscosity indication and controls in a single device. They allow you to measure viscosity in-line, and have any variations corrected instantly. This ensures any issues are fixed before they can affect your product quality. This level of real-time control cannot be achieved by any other means.  We are the best source for your viscosity measurement needs, as we have a network of expert product representatives around the world, and we can offer services such as custom design, engineering, and control pane...

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The HydroSense 3420 makes it easy to remove the flow-through sample cell.

Waste Water Samplers

We provide a selection of waste water samplers for measuring the concentration of oil in water. Our products use fluorescence or light scatter technology to monitor oil levels. They include on-line models for continuous monitoring, and transportable benchtop units for discrete sample measurements. They provide reliable output of oil concentrations in ppm. When oil concentration reaches a user-set level, our monitors can alert operators or activate relays for equipment control. Arjay Engineering Ltd. has the experience to meet all your requirements. We have a wide selection of products and c...

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On-line analyzer for clean or filtered water.

Oil & Water Analyzers

Arjay Engineering Ltd provides monitors, controls and alarms for analyzing oil and water in a variety of applications. They feature easy calibration, no moving parts, adjustable sensitivity and time delays to avoid nuisance alarms. Many of our products use capacitance technology that eliminates the need for routine cleaning. We also have oil in water analyzers that use fluorescence and light scatter technology.  We offer monitors that are certified for use in hazardous locations. We have the flexibility to provide solutions for many operations and we invite your application inquiries. Oil a...

We offer Products and Services in 160 Categories

To become the premier worldwide source for process and environmental controls.

Mission Statement

Value Proposition

Designers and manufacturers of process and environmental controls. Serving the municipal and industrial marketplace worldwide.

Serving municipal, utility, petrochemical, food, beverage, petrochemical, automotive, pulp & paper, and mining.

Areas of Expertise

  • Serving Municipal Needs

  • Utility Industry

  • Petrochemical Industry

  • Food & Beverage Industry

  • Automotive Industry

  • Pulp and Paper Industry

  • Mining Industry

  • Designing and Manufacturing Process and Environmental Controls

  • Engineering Services

  • Oil & Gas Industry

  • Gas Detection


  • Ms Jasmine Brink-Li
    Administrative Assistant

  • Tel. (800) 387-9487
    Ext. 262

    Mr Ben Benkov
    Technical Sales Representative

  • Tel. (800) 387-9487
    Ext. 228

    Mr Greg Reeves
    Sales Manager

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  • ISO 9001:2008

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