This submersible sensor & instrument selection guide will help you select products for installations where the instrumentation will be completely submerged.
Transducers for incorporating into OEM design instrumentation products to monitor or control.
Miniature size sensors with small size dimensions for measurements where a small diameter, short length or a low mass is required.
Pressure measurement sensors & instrumentation for leak monitoring. Find a pressure transmitter or transducer for leak testing.
Hysteresis is the difference of two separate measurements taken at the same point, before and after a physical quantity is increased and decreased.
The g Effect is a change in performance of a pressure measuring device that is caused by a change in its orientation. Typically a pressure sensing device will have some form of flat diaphragm which will generate a change in output when flexed by a change in pressure. If a pressure sensing diaphragm is orientated […]
Gravity (g) which is defined by an acceleration of 9.80665m/s² is the designated average accelerating force due to Earth’s gravity at sea level.
Hygienic measurement instrumentation are designed for use by the food, drink and pharmaceutical industries, which require a high level of cleanliness in their manufacturing processes.
Piezoresistive strain gauges are a semiconductor material which changes in resistance when the material stretched or compressed.
Static Line Pressure is the total pressure present at a particular point along a pressurised pipe.
Wet/Wet describes a differential pressure measurement device which is compatible with liquid on both the positive and negative side process connections.
Wheatstone bridge strain gauge circuits are used extensively inside transducer to convert a mechanical strain into an electrical output signal.
Wet/Dry describes a dp measurement device for use with a liquid on the positive pressure side and a dry/non-condensing gas on the negative pressure side.
Wetted Parts are the measurement side components of a sensing device which are in contact with the liquid media to be measured.
Select Oxygen service measurement products to use in atmosphere which contains high levels of Oxygen or measure gas containing high concentrations of O2
Mechanical Stop is an internal component which protects pressure sensing components from overpressure by limiting the deflection of the diaphragm.
MTBF or mean time between failures is a theoretically calculated value which considers all the components used in the construction of a measurement device.
The Linear Variable Differential Transformer (LVDT) is a type of sensor which converts linear displacement into an variable electrical signal.
An Isolation diaphragm is a thin membrane which is used to isolate the media on one side of a diaphragm from media on the other side.
A guide to flush diaphragm pressure & level measurement instrumentation, including explanations, applications and a choice of products with flush process fittings.
Dry/Dry describes a differential pressure measurement device which is only compatible with dry/non-condensing gas on both the positive and negative pressure side.
Pressure sensing technology which excludes any fluid filled components. The advantages of a dry cell pressure sensor are: More sensitive and responsive to measuring low pressures No risk of oil contamination if the containment isolation diaphragm fails. Compact size Lower cost of manufacture
Bourdon Tube is a flattened length of thin hollow metal tubing which is formed into a C shape.
Burst pressure is a design safety limit which should not be exceeded. If this pressure is exceeded it may lead to mechanical breach and permanent loss of pressure containment.
Bonded seal is a metal washer with an elastomer seal bonded to its inside diameter, which is used to provide a pressure seal when placed between two flat surfaces that are screwed together using a male and female parallel thread.
Bonded foil strain gauges (BFSG) are metal based foil elements that are incorporated into a flexible electrically insulating material which can then be bonded to a surface with adhesives. As stress is applied to the material, the BFSG will deform and the resistance changes. If a voltage is applied across the BFSG it can be […]
Food grade products and substances are designed to be safe when used inside equipment and processes which are used in the production of food, pharmaceuticals and drink. Food grade products and substances prevent contaminant substances from entering the food manufacturing process which could cause physiological harm.
Overpressure is used to describe a condition where the pressure value has exceeded operational limits or a threshold pressure.
Al2O3 is the chemical formula for Alumina (Aluminium Oxide) which is a ceramic material that has high caustic chemical resistance and electrical insulation.
This is a metric fine thread with a outer diameter of 10 millimetres and a thread pitch of 1 millimetre.
Find answers to questions about process connections used to install measurement instrumentation.
It is possible to view part of the diaphragm on most pressure transducers and some which are completely exposed such as flush diaphragms are particular vulnerable to mechanical damage.
Installing pressure sensors close to high temperatures can lead to significant measurement errors and irreparable damage to the sensor & electronics.
There are many materials used for constructing pressure sensors, but those made from stainless steel are considered the most reliable and durable.
It is often assumed that devices with an IP68 rating are suitable for immersing underwater for an indefinite period at any depth. Not all devices that are IP68 are intended to be continuously submerged, some only require a temporary rating to protect from occasional submersion. For example a pressure transmitter installed below ground level will […]
Placing a sensing device in a liquid is one of the most hostile environments to ensure a long reliable service life. The extra considerations for design engineers include: Keeping pressurised liquid out. Preventing condensation damage to the internal electronics. Corrosion protection for all the materials used in the transducer construction. Adequate protection from lightning surges […]
Any pressure transducer which relies on a force collecting diaphragm for sensing pressure, will be sensitive to a change in orientation. A pressure transducer diaphragm is designed to flex when a force is applied to it. If the diaphragm is orientated horizontally it will sag slightly under the force of its own weight. If the […]
When selecting pressure sensor options, occasionally you will come across a choice of seal materials to choose depending on the sensor design. An all welded construction provides a high integrity and homogeneous material design. The main disadvantages of this kind of sensor design is the lack of flexibility to customise for different applications, induced measurement […]