Differential pressure sensors can be used to measure liquid level in a tank. Here we will explain how a DP sensor is used to measure liquid level.
Liquid Level
Liquid level measurement application info & product specification guides
Hazardous Area Submersible Hydrostatic Liquid Level Sensors
ATEX/IECEx intrinsically safe IP68 sensors for liquid level measurement in intrinsically safe installations on petrochemical, pharmaceutical, landfill and sewage treatment sites.
Hazardous Area Externally Fitted Hydrostatic Liquid Level Sensors
Hazardous area external mount level sensors for use in zones where there is a high risk of explosive gases being present.
Fluid Depth, Density, Gravity, and Pressure Calculator
This tool will calculate any of parameters defined by the hydrostatic pressure formula P=ρgh which includes depth, density, gravity and pressure.
LMK 858 Plastic Submersible Liquid Level Sensor with Removable Cable
Chemical resistant liquid level sensor with detachable signal cable for measuring quantity of aggressive media such acids and alkalis and sludge in tanks located outside of factory buildings.
LMK457 Marine Approved Level Transmitter
Marine approved level transmitter with 4-20mA current loop output for shipbuilding with optional all CuNiFe construction for sea-water compatibility in ranges from 0.4 mH2O to 250mH2O gauge.
SLS-A Analogue Output Submersible Level Sensor
This 23 mm diameter stainless steel oil filled silicon piezoresistive sensing capsule based submersible level sensor provides unamplified ratiometric millivolt output or an amplified analogue output signal corresponding to ranges from 0…0.5 mWG (20 inWG) up to 100 mWG (328 ftWG).
SLS-D SDI-12 Digital Interface Submersible Level Sensor
This submersible level sensor has SDI-12 digital communications which provides the level and temperature readings as a serial output using the SDI-12 version 1.4 protocol.
Calculating required pressure range for fuel tank level measurement
Using a pressure measurement instrument to measure fuel level is very common, however most are scaled in bar or psi pressure ranges, and if they do happen to be scaled in level units, they are typically water level based, such as mH2O or ftH2O.
inH2O to bar Conversion Table
Find a value from 1 to 1000 inches of water column to determine the equivalent value in bar pressure units.
ftH2O to bar Conversion Table
Scroll down to the required water column height between 1 and 40,000 feet of water to find the matching hydrostatic water pressure in bar.
mH2O to kPa Conversion Table
Look up a metre of water column value from 0.1 to 100 to find the converted in value in kilopascal units.
mH2O to bar Conversion Table
Scroll down to the required water column height between 0.1 and 10,000 metres of water to find the matching hydrostatic water pressure in bar.
LMP305 Borehole Level Transmitter
Submersible stainless steel pressure transmitter ideal for geotechnical surveying with a 19mm diameter for measuring hydrostatic water level in bore-holes.
Hydrostatic Liquid Level Switches
Hydrostatic pressure sensing switches for activating switch contacts at predetermined liquid level thresholds.
Float Fluid Level Detection
Float activated switches for opening or closing electrical contacts at a preset fluid level.
Float Liquid Level Switches
Float actuated devices for monitoring liquid level and activating switch contacts at predetermined liquid level thresholds.
Liquid Level Switches
Measurement and point detection devices for monitoring liquid level and activating switch contacts at predetermined liquid level thresholds.
Ultrasonic Liquid Level Switches
Ultrasonic devices for monitoring liquid level and activating the opening and closing of switch contacts at predetermined liquid level thresholds.
Vibrating Tuning Fork Fluid Level Detection
Vibrating tuning fork switches for opening or closing electrical contacts at a preset fluid level.
Vibrating Tuning Fork Liquid Level Switches
Vibrating tuning fork devices for monitoring liquid level and activating switch contacts at predetermined liquid level thresholds.
Conductive Fluid Level Detection
Conductive sensing for detecting when a preset fluid level has been reached.
Conductivity Liquid Level Switches
Conductive devices for monitoring liquid level and opening and closing switch contacts at predetermined liquid level thresholds.
Capacitive Liquid Level Switches
Capacitive switches for opening or closing electrical contacts at a preset liquid level thresholds.
Capacitive Fluid Level Measurement
Capacitance method for measuring the level of a fluid.
Capacitive Liquid Level Sensor Probes
Capacitance sensing probe devices for measuring liquid level and converting it to an electrical signal to send to other instrumentation.
Radar Liquid Level Sensors
Radar based sensing devices for measuring liquid level and converting it to an electrical signal to send to other instrumentation.
Ultrasonic Liquid Level Sensors
Ultrasonic echo sounding sensors for measuring liquid level and converting it to an electrical signal to send to other instrumentation.
Liquid Level Sensors
Device for measuring liquid level and converting it to an electrical signal to send to other instrumentation.
18.605 G Low Cost Submersible Diesel Fuel and Water Tank Level Sensor
Low cost OEM diesel fuel or water level sensor for installing inside or outside a storage tank.
Liquid Level Transmitter 4-20mA Current Output Calculator
This liquid level transmitter 4 to 20 milliamp current output calculator provides a way to determine the output reading from the liquid level measurement and liquid level transmitter range
LevCal Submersible Hydrostatic Liquid Level Sensor Calibration Kit
Pressure calibration kit for calibrating a submersible hydrostatic liquid level sensor out of the water using a battery powered automatic pressure controller calibrator to generate and accurate source of air pressure, and the necessary test hose and adapters to attach to the different types and styles of submersible pressure sensor probe ends.
Dual input indicator to display & calculate the liquid level of a pressurised tank
We need to measure the level of liquid in a pressurised tank. We have a pressure sensor at the top of the tank and one at the bottom.
How do you measure the volume of a liquid using pressure
It is not possible to measure the volume directly, and unfortunately there is no such device as a volume sensor, however if you know the dimensions of the space filled with liquid, you can easily determine the volume.
LMP 308 Removable Waterproof Cable Connection Water Level Sensor
Groundwater, tank & reservoir water level detachable submersible cable hydrostatic liquid level sensor for multiple municipal water level measurement locations.
DPT200 Pressurised Tank Level Differential Pressure Transmitter
Pressurised tank liquid level differential pressure cell transmitter for process plant storage.
Cement plant process water basin level sensor
Measure the level of a fresh water basin used for storing industrial process water in a cement plant.
Marine aquaculture submersible seawater level & temperature transmitter
Use this dual output transmitter for monitor or controlling the water level and temperature of salt water ponds & tanks used in marine aquaculture systems.
Aquaculture submersible freshwater level & temperature transmitter
Use this dual output transmitter for monitor or controlling the water level and temperature of freshwater ponds & tanks used in aqua farming.
4-20mA Output Hydrostatic Level Transmitters & Sensors
Liquid level transmitters with a 4 to 20 milliamp current loop output signal for determining liquid depth or the fluid level by measuring the hydrostatic pressure.
Submersible Hydrostatic Level Sensors & Probes
Level sensors for submerging permanently in liquid to determine the level or depth of fluid by measuring the hydrostatic pressure.
Water tank level gauge transmitter with adjustable range
We are looking for level measurement gauge transmitters for water tanks used for domestic water and fire water in a hotel.
Hydrostatic Liquid Level Voltage Output Pressure Transducers
Hydrostatic pressure transducers for measuring the height of a liquid column via a proportional amplified voltage output signal.
Water Level Transmitters with 4-20mA Output
4 to 20 mA current loop output water level transmitters with a for use with process instrumentation for measuring the level of water in a water well, water reservoir, river or water storage tank.
0-10 Volts Output Hydrostatic Sensors, Probes & Transducers
Analog output hydrostatic sensors with a 0 to 10 volt amplified output signal for measuring liquid head pressure or fluid level.
Waste Water Level Sensors
Waste water Level sensors with open face flush diaphragms for measuring the hydrostatic pressure of sewage and effluent waste. Select a level sensor for mounting inside or external to a tank or sewer pipe.
External Mounted Tank Level Sensors
External mounted level sensors for installing on the outside of a liquid storage tank to measure level of tank contents.
ATEX Approved Liquid Level Sensors for Hazardous Areas
European hazardous area ATEX approved sensors for liquid level measurement in intrinsically safe installations on petrochemical, pharmaceutical, landfill and sewage treatment sites.
Harbour seawater level sensor with digital display & relay outputs
sensor which can installed down a tube to measure seawater level in a harbour in order to switch a pump on when the tide comes in
Hydrostatic Level Sensors
Hydrostatic pressure sensing devices for measuring liquid level and converting it to an electrical signal to send to other instrumentation.
Liquid Level to Hydrostatic Pressure Calculator
This calculator and conversion scale will convert the depth of fluid to a measurement of hydrostatic pressure, P = L·ρ₀·SG·g
Pressure to Liquid Level Calculator
This calculator and conversion scale will determine the liquid height from the hydrostatic pressure, L = P/(ρ₀·SG·g)
Generator diesel tank height level sensor for 1 metre height
I have a tank 1 metre cubed that holds 1000 Litres of diesel for a generator. I am trying to find a sensor that will inform me of the contents/level
IMSL IP68 Stainless Steel 316L Hydrostatic Pressure Sensor
Water resistant pressure sensor for measuring hydrostatic pressures in the range of 0-0.5 mWC up to 0-100 mWC.
Hydrostatic Liquid Level Sensors
Collection of resources for selecting and using a hydrostatic liquid level sensor.
How to determine milk tank level and volume from pressure
How do I convert the pressure reading to quantity of milk at bottom temperature which varies approx 10 deg C
40 foot high diesel tank submersible pressure sensor
What submersible pressure sensor would you suggest to measure a 40′ deep diesel storage tank?
IMSTL IP68 Water Temperature and Depth Transmitter
Stainless steel 316L waterproof probe for measuring both water temperature and depth and generating two separate 4-20mA current loop measurement signals.
IMCL Low Cost Submersible Pressure Sensor
Economical IP68 protected sensor with stainless steel 316L housing and Ceramic strain gauge sensing diaphragm for measuring liquid depth pressure.
IWSL Potable Water Submersible Level Sensor
IP68 protect pressure sensor for monitoring potable water level to depths of 100 metres.
LMK307 Submersible Waste Water Level Sensor
Submersible waste water level sensor with optional intrinsic safety certification for monitoring the level of sewage and effluent in water treatment plants.
LMK351 High Overpressure Flush Level Transmitter
Flush capacitive ceramic pressure sensor for measuring corrosive and viscous liquid level from levels 0.4 metres of water up to 200 mH2O.
LMK331 Screw-In Ceramic Level Transmitter
Level pressure sensor with semi-flush ceramic diaphragm and stainless steel or PVDF wetted parts in ranges from 0-4 to 600mH2O gauge.
MTM/N10 10mm Diameter Submersible Miniature Pressure Transducer
MTM3000 Miniature Level Sensor specially designed for inserting down very small boreholes in wells, dams and many geophysical research applications.
cmH2O – Centimetres of Water Column at 4 deg C Pressure Unit
Centimeters of Water Column is a manometric unit used to relate a pressure reading to the height of fresh water at a temperature of 4 degC. 1 centimeter of water gauge equals 98.0665 pascals.
ftH2O – Feet of Water Column at 4 deg C Pressure Unit
Foot of Water Column is an American and English low value pressure unit
Hydrostatic Pressure
Hydrostatic pressure is the pressure that is generated by the weight of liquid above a measurement point, when the liquid is at rest.
mH2O – Metres of Water Gauge at 4 deg C Pressure Unit
Meters of water gauge or column is a metric unit for measuring liquid level. 1 metre of water column at 4 degrees Celsius equals 9806.65 pascals.
mmH2O – Millimetres of Water Column at 4 deg C Pressure Unit
Millimeters of Water Column is a low range metric pressure unit derived from the hydrostatic pressure of 1mm head of water at 4 degC.
Specific Gravity
Specific gravity is a comparison ratio between the density of a particular substance and the density of a reference substance.
Dockside sea water tide level transmitter up to 6 metres depth
Pressure transmitter for measuring depth of tide in a dock from 0 to 6 metres of seawater.
HART flameproof (Ex d) re-scalable level transmitter for hydrostatic head up to 2 metres
HART compatible, ATEX flameproof approved, rangeable level transmitter to measure hydrostatic head of water/glycol or mineral oil fluid within a reservoir about 2 metres in height.
River level sensor for run-of-the-river hydropower monitoring up to 4m
Vented pressure river level sensor for measuring water level up to 0.4 bar in run-of-the-river hydroelectricity systems.
Rectangular Shaped Tank Contents Calculator
This tool calculates the volume of liquid held in a rectangular shaped tank using the measured level of the fluid.
Horizontal Cylindrical Shaped Tank Contents Calculator
This calculator will take the measurement of liquid height from a horizontal cylinder tank and convert it to liquid volume held in the tank.
Vertical Cylindrical Shaped Tank Contents Calculator
Use this calculator tool to determine the amount of contents in a upright cylinder shaped liquid storage tank from the measured height of fluid in the tank.
1 metre deep raw sewage ATEX approved submersible level transmitter
Submersible flush diaphragm raw sewage level transmitter for measuring levels of wastewater up to 1 metre in depth.
2 metre deep diesel tank level sensor for submersion
Submersible diesel level pressure sensor for installing in the bottom of tanks up to 2 metres deep.
10 metre submersible water depth and temperature transducer with USB digital connection
USB interface IP68 pressure sensor to accurately indicate the depth and temperature of fresh water up to 10 metres water depth.
3 metre deep river water level transducer with low voltage output
Water level sensor for monitoring river level up to 3 metres (10 feet) with a low voltage signal for remote site data acquisition.
50 metre borehole water depth transmitter for dry running protection
Immersed liquid level sensor for use with borehole pumps to protect from dry running.
20 foot deep submersible salt water level transmitter for marine use
Submersible pressure transmitter for salt water tank applications to measure water levels up to 20 feet.
1 metre depth range Titanium housing submersible transducer
Titanium hydrostatic depth transducer for measuring up to 1 metre depth of sea water.
2.5 metre water level transmitter for submersing inside underground tank
Tank depth sensor for an underground cylindrical rain water collection tank which is 2.5 metres tall.
1 metre screw-in plastic level sensor for biodiesel/sulphuric acid mixture with 4 to 20 mA output
Screw-in liquid level sensor for measuring the height of biodiesel with 3% sulfuric acid (H2SO4) from 0 to 1 metre head
Diesel tank level transducer for mobile phone cellular transmitter/receiver mast sites
OEM fuel level sensor for diesel generators installed at telecom mobile cell tower sites.
70m/230ft depth SDI-12 submersible freshwater level probe
This probe has a SDI-12 digital interface which is standardised protocol for environmental monitoring instrumentation.
1.6 mH2O submersible transmitter for wash water break tanks
Submersible level transducer with a 4 to 20 milliamp output for measuring wash water level in a break tank up 1.6 metres deep.
kPa to ftH2O Conversion Table
Find how deep a pressure in kilopascals will be when converted to a water depth in feet.
10 metre / 32.8 feet deep fresh water level and temperature digital sensor
Hydrostatic level & temperature measurement submersible probe for measuring freshwater up to 10m (32.8ft) & temperatures -20 to +60 degC via USB.
kPa to mH2O Conversion Table
Look up a kilopascal value from 1 to 1000 to find the converted in value in metre height of water units.
10 metre sea water depth sensor with millivolt output
Sea water compatible submersible pressure sensor for measuring down to 10 metre depth.
Liquid Level Measurement
Questions and answers about liquid level measurement
4 metre range submersible freshwater level transmitter
Submersible pressure sensor for measuring up to 4 metres of fresh water depth with a 2 wire 4 to 20 milliamp current loop output.
6 metre range submersible freshwater level transmitter
Submersible pressure sensor for measuring up to 6 metres of fresh water depth with a 2 wire 4 to 20 milliamp current loop output.
3 metre range submersible freshwater level transmitter
Submersible pressure sensor for measuring up to 3 metres of fresh water depth with a 2 wire 4 to 20 milliamp current loop output.
Low power consumption SDI-12 lake water level sensor
Lake water level sensor for immersed installations to measure the quantity of water in a lake with a low power consumption SDI-12 interface.
100 meter IP68 sea water level transmitter with Marine & ATEX approval
Submersible sea water level transmitter with GL and DNV marine approval and a measuring range of 0 to 100 meters of water.
Submersible diesel fuel tank level sensor with 5V out for 7ft height
Diesel fuel oil tank level sensor with 0 to 5 volt analog output signal for measuring contents in storage tanks up to 7 feet in height.
DNV / GL marine certified submersible seawater level transmitter for 0-3 metre depth
Marine approved sea water level sensor for monitoring a 3 metre change in salt water depth.