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When it comes to pressure sensors, there is a tremendous number of choices available in today’s marketplace. All the different measuring technologies and principles that are promoted by manufacturers can make choosing the correct one a seemingly impossible task. Here we can help you to learn more about the different technologies available and how we can help you to select the optimal solution for any application. 

Function of a Pressure Sensor

Pressure Sensors (or pressure transducers) are components that work by converting an actual pressure value into an electrical signal. Pressure sensors are available with a variation of different sensing elements and respond to the force applied to this element by gas or liquid pressure. The force applied to the element is then measured and converted into an electrical output signal, allowing it to be monitored by PLCs, processors and other computers.

Flow switches (or flow sensors) are often a crucial component for any manufacturing operation. With so many different options available on the market, how can you ensure you’re getting the right device for your application? Here you can learn more about the mechanics of our flow switches and how we can help make it easy for you to select the perfect solution for your needs.

Operation of a Flow Switch

Taking our popular LPH Series non-adjustable flow switch as an example, when air/water flows through the unit it causes the magnetic piston to move up at the calibration point. This displacement is caused by the pressure differential from the air/water flowing through the unit. The magnetic piston actuates a hermetically sealed reed switch, which is encapsulated in the body of the unit, out of the media wetted flow path. Decreasing the flow below the calibration point causes the reed switch to de-actuate. The LPH series is a fixed set point flow switch that has a predetermined calibration point, designed to act primarily as an air flow switch or water flow switch.

When it comes to selecting pressure regulators, there is a seemingly overwhelming number of choices available on the market. But the fact is, each different type of pressure regulator has a different functionality, and therefore a different purpose in each individual application. Here at Boiswood we aim to help educate all our customers towards learning more about the different types available and how you can select the best regulator for your needs.

Types of Pressure Regulators

• Pressure Reducing – a single stage pressure regulator, designed to take a higher inlet pressure (P1) and reduce to a lower controlled outlet pressure (P2).  
   
• Back Pressure – a back pressure regulator (or “overflow” regulator), designed to maintain a constant inlet pressure (P1), offering end users a controlled and stable line pressure.
   
• Cylinder Pressure – a dual stage pressure regulator, designed to take a higher inlet pressure (P1) and reduce to a lower controlled outlet pressure (P2). These are often installed on gas cylinders/bottles to provide a higher level of control accuracy as the cylinder depletes.
   
• Vaporising – either electrically heated or steam heated pressure regulators, designed with either pressure reducing (single stage), back pressure or dual stage mechanical operation. Vaporising regulators are used to heat the media as it passes through the wetted flow path, often situated upstream prior to sampling systems or analysers.
   
• Speciality Regulators – regulators utilising any of the above-mentioned principles, except designed for different applications including miniature/compact versions for small space claims, dome-loaded for pneumatic pilot air operation, high pressure design for up 10,000 PSIG control, high flow design for up to 3.00 Cv, high temperature for up to +537°C, crossover manifolds for automatic changeover of cylinder bottles and more.

Since 1938, from standard valves to custom designed solutions - our partner, Stöhr Armaturen, has been unrivalled with expertise and technical know-how in manufacturing optimised solutions. Stöhr have always been well-known for their specialist designs, functional reliability and long operational lifespan. For decades, Stöhr have been providing valves which have convinced customers through their quality and price, from small quantities of standard units to completely tailor-made solutions. Stöhr is renowned in the markets they serve for their technical expertise and comprehensive advisory service.
 

Our product range of standardised cryogenic valves and gas filters in sizes from DN4 to DN300 include high precision cryogenic control valves, on/off valves, regulating valves, check/non-return valves and blow-off valves for installation in valve boxes, vacuum-jacketed lines or conventional pipework. We can offer body types with housings in straight or angle pattern, and all valves are made of high-grade or special Stainless Steel sealed with bellows.

Our range of ultrasonic level switches and sensors are designed to operate in a wide spectrum of liquids, ranging from oils to inks. These rugged transmitters are typically constructed from stainless steel and built to withstand high pressures, temperature, and vibration and operate in a broad range of liquid media.

These are designed to provide accurate and reliable level sensing for difficult to monitor fluids, where contact with media is not desirable from the extremes of sending: ultrapure to corrosive or even dirty where coating or scaling is possible. Ultrasonic level transmitters have no moving parts, are easy to install and simple to use.