Ex pressure gauge and logger for recording up to 300 lbs/sq in

Ex hazardous area battery powered digital pressure gauge with a 1/4 BSP male process connection which can record pressures up to 300 lbs/sq in

High resolution minus 150 mbar range pressure transducer

We need to measure vacuum difference from zero to minus 150mbar below atmospheric pressure.

80 kPa suction pressure transducer with 4-20ma output

Customizable pressure transducer with 4-20mA output for measuring 0 to -80 kPa suction pressure. Ideal for vacuum systems, filtration, and industrial applications.

1600 bar data acquisition and recording system

We are looking for a data acquisition and recording system with 1600 bar rated pressure sensors

Fresh water compatible submersible 1mH2O range 4-20mA output pressure sensor

What submersible pressure sensor should I purchase for measuring a hydrostatic pressure of fresh water up to 1 metre?

Hygienic atex approved 100mbar pressure transmitter for pharmaceutical application

Hygienic ATEX approved pressure transmitter for zone 2 to read pressures from 15 to 25mbar.

How to get a 10 volt signal from a 4-20mA output pressure sensor

I have a 4 to 20mA pressure sensor, is there a way of converting the output to a 10 volt signal so I can use a voltage input data acquisition card?

Datalogging pressure gauge to use in hazardous zone 1 to measure 0 to 400 psig

We would like the instruments to be able to record / store pressures for subsequent retrieval with a handheld or laptop computer via the USB port.

USB pressure sensors for detecting water leaks & restrictions

I have a research problem where I need to detect leaks and obstructions in a pipe network

2 bar water pressure difference sensor and single input process indicator

I am looking to measure the pressure difference across a water cooler with a maximum diff pressure of 2 bar

Portable battery powered tank level gauge with submersible sensor

Is there anything portable that could be dropped into different sized and irregularly shaped tanks to measure the amount of change in liquid height?

Helium and Nitrogen compatible 150bar range current loop output pressure sensor

We are looking for current loop pressure sensors with a range of 0-150bar to measure pressure in a Nitrogen and Helium environment

Vacuum gauge to measure both absolute & negative gauge pressure

Checking vacuum pressure as a positive pressure and also as a negative pressure depending on the type of vacuum equipment being tested

200 metres of water column head pressure gauge

I am looking for a digital display pressure gauge which will read hydrostatic pressure up to 200 meters head

Logger to store vacuum readings over 24hr period

I require a vacuum sensor loggers to monitor vacuum application bags. The vacuum I need to monitor is 0.25 to 0.4 bar over a 24 hour period.

3000 psig hydraulic transducer and ac powered digital readout

I need a hydraulic transducer that measures pressure up to 3000 psi pressure units with a separate digital read out that can be located away from the transducer.

DP sensor for -1 to 3 bar differential water pressure and 16 bar overpressure

I am looking for a 4-20mA output DP sensor with a -1 to 3 bar differential range for use on water. The sensor will need to withstand an overpressure of 20 bar on the positive side and 1.5 bar on the negative side.

300 cm water level sensor for submersing in tank

We are looking for a level sensor for submerging into a water tank to measure a level between 10 and 300 cm.

Intrinsically safe digital gauge for monitoring 300mbar pressure

I am looking for a digital pressure gauge which is suitable for use in an intrinsically safe zone which will measure between 0mbar to 150mbar

10 bar air pressure gauge for connecting to laptop

Digital pressure gauge with PC interface with digital output for displaying and logging pressure readings up to 10 bar g on a laptop computer in real time.

Wet wet DP sensor for 10 inches of water range

We are interested in a Low pressure differential pressure sensor and need a wet/wet in a 10″ H2O range

270 degC gas pressure indicator

We are looking for a digital pressure indicator for use with high temperature gas to a maximum temperature of 270 degC

Low cost 10 mWG digital pressure gauge

looking for a low cost digital pressure gauge which can display in mH2O pressure units up to 10 meters of water

Pressure gauge and hand pump for calibrating up to 150psi?

I am working in a water treatment plant and will be calibrating tank level transducers, pressure transducers and head loss transducers. The maximum pressure I will be calibrating will be up to 150 psi

Argon gas pressure sensor for 0-20mbar above atmospheric pressure

We are looking to measure Argon pressure in a pipe flow which should be in the range of 20 mbar above atmospheric.

Calibrator for testing absolute pressure measurement devices

Can you provide information for an absolute pressure calibration tester which has both a display and a pump?

mmHg to kPa Conversion Table

Search down the list for a pressure from 1 to 1000 mm Hg to read off the equivalent value in kilopascals.

All-In-One transmitter for measuring steam temperature to 150°C and pressure to 4kg/cm² g

All-in-one pressure and temperature transmitter for high temperature media such as steam up to 150 degrees Celsius for measuring pressure over 0 to 4 kg/cm2g and temperature over 0-150 degC.

ftH2O to mH2O Conversion Table

Pick the American water level unit in ftH2O that you would like to convert and read off the equivalent converted value in Metric water column units mH2O.

SCU for Isolating signal from sensors and trimming zero and full span

Can you suggest a universal signal conditioning unit for isolating a sensor & providing local calibration adjustment for trimming zero & full scale output?

Submersible sensor for measuring sludge pressure in pipe

Submersible pressure sensor to measure 10 bar pressure in pipe that is IP68 for long term submersion in sludge up to 6 metres deep.

What can cause random variation in pressure transducer output

I have a 10bar pressure transducer with a 4-20mA output which is showing a random variation across a span of 0.3mA (+/- 1.5mA) at a fixed pressure.

bar to psi Conversion Table

Scan the table from 1 to 1000 for the pressure reading in bar to find the corresponding pounds per square inch pressure value.

kPa to kg/cm² Conversion Table

Find the value from 1 to 1000 kilopascals that you would like to convert into kilograms per square centimeter.

Problem with zero drift when installing submersible pressure sensor

I‘m having a problem zeroing a submersible pressure sensor. Before placing it in the water, the zero offset is trimmed on the indicator, and then it is submerged to full range depth of 10 metres. During the first few minutes we notice that the full scale reading drifts by about 10mm in the negative direction […]

mH2O to ftH2O Conversion Table

Use the left column to find the depth in meters of water and read off the converted depth in feet of water.

bar to mH2O Conversion Table

Scroll down to the required water pressure value between 0.01 and 1,000 bar to find the matching water column height in metres of water.

inH2O to Pa Conversion Table

Find a value from 1 to 1000 inches of water column to determine the equivalent value in pascals.

kg/cm² to kPa Conversion Table

Look down the table to find a value between 0.01 and 10 kilogrammes per sq cm to read off the corresponding conversion to kilopascals.

psi to bar Conversion Table

Scroll down to find the pounds per square inch value you want to convert into the equivalent bar pressure.

Pond water level gauge with battery power

Do you have a battery operated solution to measure the level of a Water pond?

inHg to mbar Conversion Table

Choose readings from 0 to 40.00 inches of mercury to convert them into millibars.

4-20mA square root extraction conversion to linear % full scale

How do you convert a square root extraction 4-20mA analog signal to a linear 0-100% scale?

inH2O to kPa Conversion Table

Look up a reading from 1 to 1000 inches of water column to see the conversion value in kilopascals.

High pressure data logging to 20,000 psi

The ADT681 is a logging pressure gauge which has the option for a 25,000 psi pressure range.

psi to MPa Conversion Table

Look up a hydraulic pressure reading between 100 to 100,000 pounds per square inch to find the corresponding value in megapascals.

Torr to mbar Conversion Table

Look up low vacuum range pressures from 1 to 1000 Torr to read the corresponding value in mbar.

Atmospheric range for 4-20mA pressure sensor

Do you have 4-20mA pressure sensor that can be used to measure ambient atmospheric pressure? Yes, the DMP331 has the option for a 4-20mA output scaled from 800 to 1200 mbar, but you can also specify a different scaling if necessary here.

Shunt resistor calibration explanation

What is the method of shunt calibration in relation to an indicator connected to a pressure transducer?

0 to 9 pascals range pressure gauge

Low Pascal range pressure gauge for measuring from 0 to 9 pascals and provide a digital readout of the pressure readings?

Genset hydrostatic sensor for measuring level of small diesel tank up to 12 inches

Hydrostatic type sensor for submerging inside Genset fuel tanks to measure the level of diesel

Difference between vented and non-vented water level measurement

A hydrostatic level probe typically uses pressure sensor to measure the water level. The main component of a pressure sensor is the sensing diaphragm which converts the difference in pressure between either side of the diaphragm into a measured signal. The front of the diaphragm measures the water level pressure (hydrostatic pressure) plus the barometric […]

Temperature Measurement

Questions and answers about temperature measurement

Determining water tank volume using hydrostatic pressure

Can a pressure measurement device be used to measure the volume in a rainwater harvesting tank?

0 to 5 volt output sensor for measuring low seawater level

What sensor would you suggest for measuring low levels of seawater with a 0-5Vdc?

daPa – Dekapascal Pressure Unit

Find conversions for the daPa (dekapascal) pressure unit.

Measurement Signal

A guide to measurement signal types for sensors & instrumentation, with explanations, applications and choice of products for analog & digital signals.

What is difference between working, burst and over pressure

I have a confusion regarding the difference between the maximum working pressure, overpressure and burst pressure for pressure transmitters.

Converting non-vented depth readings & barometric pressure to true depth

I have level data from a non-vented transducer & barometric pressure data, how do I determine the true depth?

Process Connections

Find answers to questions about process connections used to install measurement instrumentation.

3 wire 4 to 20mA pressure transmitter to measure 100 mbar

We are looking for a pressure transmitter with a range from 0 to 100 mbar and a 4-20mA output with a 3 wire electrical connection

Flow Measurement

Flow measurement online tools, help guides, products types, questions and answers.

400mm water level transmitter with 1mm accuracy

We are looking to measure liquid level to an accuracy of 1mm over a range of around 125mm.

Digital Output Square Root Extraction Formula and Tables

Square root extraction signals are used to simplify closed pipe liquid or gas flow calculations and to improve resolution of the non-linear signal when converted to a flow reading.

Advantages and Disadvantages of using a 4 to 20 mA Signal

A 4-20mA current signal has become very popular for many applications beyond it’s original intended purpose in the process industry. It is now used throughout industry as the preferred measurement and control signal for many different types of systems. Despite the popularity of the 4-20mA signal, it is not the best solution for every application […]

Not reading zero when pressure is vented to atmosphere

Understand zero offset in pressure devices. Learn causes of zero drift, how to correct it, and when it might signal a problem.

mV/V – Millivolts per Volt Output Signal

It is an electrical signal which is proportional to the applied excitation voltage and is also referred to as a ratio-metric or strain gauge output.

How to Connect a 4-20mA Current Loop Pressure Transmitter

All devices connected to make up a 4 to 20 milliamp current loop are connected in series.

Symptons and Causes of Damage to Pressure Transducer Diaphragms

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.

Measurement Accuracy

There are many contributing error factors which go into a total uncertainty calculation. The way accuracy is defined for pressure instruments on technical data sheets can vary significantly across manufacturers and product types.

Barometric Pressure

A guide to barometric pressure measurement including explanations, applications and choice of products for measuring barometric pressure.

Pressure Calibration

This guide will answer many of your questions about using & selecting pressure calibration equipment.

Using Hydrostatic Pressure Transducers for Measuring Fluid Level

There are a number of methods and technologies for measuring the level of a fluid with hydrostatic pressure transducers.

Measuring the Pressure of Hot Media

Installing pressure sensors close to high temperatures can lead to significant measurement errors and irreparable damage to the sensor & electronics.

Stainless Steel Pressure Sensors

There are many materials used for constructing pressure sensors, but those made from stainless steel are considered the most reliable and durable.

Are all IP68 Water Resistant Protection Ratings the same

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 […]

Using an Absolute Sensor to Measure Gauge Reference Pressure

When it is necessary to present gauge reference pressure data, an absolute pressure sensor can be used in some situations if a gauge pressure sensor is not available. An absolute pressure sensor will measure total pressure independent of atmospheric pressure changes, unlike a gauge pressure sensor which measures pressure relative to atmospheric pressure. To convert […]

Determining the signal cable length of a suspended liquid level transducer

Deciding the correct length of cable for a suspended IP68 transducer is an important part of specifying, if the cable is too short it is difficult and expensive to join two cables together and make the seal liquid tight.

Why are Submersible applications so demanding of Pressure Transducers?

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 […]

Transforming a 2 wire Current Loop into a Voltage Output Signal

If you are running a signal cable over a long distance or have a spare current output pressure transmitter, it is possible to convert the output signal to a voltage type to make it compatible with voltage only input devices. A typical current output is 2 wire 4 to 20 mA which is designed to […]

Does the type of Engineering Units matter for Pressure Transmitters

When selecting a part number for a pressure transmitter you will need to choose a pressure range. Usually a manufacturer will designate pressure ranges in the most common unit used by it’s customers. For the USA the most common unit is psi and for Europe it is bar, but what if you are working with […]

Considerations for monitoring Landfill Water Level

In recent years regulations for environmental control, health and safety issues have become much more stringent for existing and new landfill sites. The regulations encompass many considerations and some involve the measurement and control of water level in many positions around a waste disposal site. One application is ensuring contaminated water is contained within a […]

Converting 4 to 20mA Linear Signal to and from Square Root Extraction Signal

The flow rate along a closed pipe is directly proportional to the square root of the pressure drop or differential pressure between two points.

How does changes in Local Gravity affect Hydrostatic Pressure

The value of hydrostatic pressure for a fixed height column of fluid is directly proportional to the gravitational strength at a particular geographical location. Generally if the height above sea level is increased the hydrostatic pressure will decrease. Also since the world is wider at the equator than the poles the gravitational pull will increase […]

How Gravity affects the performance of Pressure Transducers

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 […]

Incompatible Pressure Sensor Specifications

We occasionally receive requests for combinations of pressure sensor features that are not practical to include in the same specification. Below is a list of the most requested parameter combinations that are declined including explanations. Low Pressure Range with High Media Temperature – the thin and large diameter diaphragms used in the construction of low […]

What does the suffix a, abs, d, dp and diff, g, rel and sg mean after the pressure units in a pressure range?

There is a loose convention across manufacturers for designating the type of reference that a pressure sensing device has, which can be confusing if you are unfamiliar with specifying this often overlooked but critical specification parameter.

Measuring the difference in air pressure between rooms

Monitoring and controlling the pressure in a room is a critical parameter in many indoor environments where the climate must be maintained at a particular temperature, humidity and cleanliness/containment level.

Why do you have to select an elastomer seal material for some types of pressure sensor?

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 […]

Calibration Hand Pump performance depends on test volume

Most air hand pumps that are designed to be used as pressure calibrators include a coarse pressure generator and a fine pressure adjuster. The effectiveness of both is dependent on the test volume connected to the pump. The coarse or main pressure generator is typically a piston and cylinder arrangement which is actuated either by […]

What is the difference between a pressure transducer and a transmitter

When browsing through pressure measurement products you will notice that some are called pressure transducers and others are called pressure transmitters.

What is the difference between gauge and absolute pressure measurement

Determining whether you need gauge or absolute reference pressure is a very important to selecting the right pressure range for a pressure instrumentation.

Digital sensor for high precision pressure calibration

The alternative to expensive high accuracy pressure control calibrators is to use a high precision digital pressure sensor.

Improve the electrical termination of vented submersible pressure sensors

Submersible cable is more expensive because it has to be reinforced to support the sensor plus its own weight in deep holes without stretching which would lead to a change in sensor position and ultimately sensor calibration. A submersible cable also has a vent tube running through it to allow gauge reference pressure sensors access […]