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Pressure sensors

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HX711 - amplifier for tensometers

Operational amplifier is designed to handle strain beams. The system is supplied with the voltage from 2.6 V to 5.5 V, communicates via a two-wire bus: the data line and a...
5.0 (4)
Index: DNG-12479
Index: DNG-12479
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The conductive membrane for measuring the pressure of the force - Adafruit 1361

The membrane is made of a conductive material. The pressure, at any point, changes the resistance, which leads to the measurable change of the voltage in a simple way. The...
5.0 (1)
Index: ADA-05014
Index: ADA-05014
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HX711 - amplifier for a strainer beam - SparkFun SEN-13879

Operational amplifier is designed to handle strain beams. The system is supplied with the voltage from 2.7 V to 5.0 V, communicates via a two-wire bus: the data line and a...
5.0 (12)
Index: SPF-04283
Index: SPF-04283
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Regular price €12.90 Price €12.90

Tensometric beam NA1 10kg (100N)

Strain gauge beam allowing to measure loads up to 10 kg . It is perfect for places where measurement accuracy is an absolute priority. The tightness level of the beam is IP66...
Index: MAR-24196
Index: MAR-24196
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Stretch sensor - conductive rubber sheet - 200x200x0,5mm - Adafruit 5464

Tensile sensor in the form of a rubber sheet with dimensions of 200 x 200 x 0.5 mm. The principle of operation is very simple - the product increases its electrical resistance...
5.0 (2)
Index: ADA-21826
Index: ADA-21826
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Stretch sensor - conductive rubber sheet - 200x200x1mm - Adafruit 5463

Tensile sensor in the form of a rubber sheet with dimensions of 200 x 200 x 1 mm. The principle of operation is very simple - the product increases its electrical resistance...
5.0 (1)
Index: ADA-21827
Index: ADA-21827
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Piezoelectric membrane with wires - 20mm - SparkFun SEN-10293

The piezoelectric elements are useful for detecting the vibration or knocking. You can use them in a simple way by reading the voltage at the output. It can also be used for...
5.0 (6)
Index: SPF-11152
Index: SPF-11152
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Mini Scales Unit - Pressure sensor up to 5kg - HX711 - expansion module Unit - M5Stack U177

Mini Scales Unit is an integrated miniature scale that combines a weighing sensor with a 5 kg range , an ADC acquisition system ( HX711 ) and a microprocessor for direct...
Index: MSS-24374
Index: MSS-24374
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Tensometric beam YZC-1B(97) 40kg (400N)

Strain-gauge beam operating in the range of up to 40 kg (400 N approx.). It is applied, for example, for kitchen scales, portable scales. The connecting cable has tips with the...
5.0 (1)
Index: SES-03098
Index: SES-03098
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Grove - ADC converter for HX711 load cell sensors - Seeedstudio 101020712

Arduino compatible 24-bit ADC converter module allows to read values from pressure sensors. It has built-in amplifier with optional 32 dB, 64 dB and 128 dB gain. On the board...
5.0 (2)
Index: SEE-15855
Index: SEE-15855
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Strain Beam Module - with 24-bit ADC NAU7802 - STEMMA QT / Qwiic - Adafruit 4538

The Adafruit module is equipped with the NAU7802 chip, which enables reading data from strain gauge beams . Includes ultra high resolution 24 bit differential ADC with...
5.0 (1)
Index: ADA-21578
Index: ADA-21578
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Force sensor FSR-402 - 2kg round 18mm - Pololu 1696

The pressure sensor reduces its resistance as the force applied to the round tip increases. Round sensor with a diameter of 18 mm.
4.5 (2)
Index: PLL-00753
Index: PLL-00753
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Tensometric beam NA27 3kg (30N)

Strain gauge beam operating within the range up to 3 kg , (approx. 30 N). The smallest version is used e.g. for kitchen scales, portable scales. The connection cable has...
Index: SES-03543
Index: SES-03543
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Regular price €13.90 Price €13.90

Pressure sensor cell 50kg - 4pcs.

Pressure sensor reduces its resistance when the force put to the square tip, increases. The sensor is in the form of a rectangle with sides of 33 mm. The set has 4 pieces,...
5.0 (1)
Index: MOD-07267
Index: MOD-07267
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Tensometric beam NA1 20kg (200N) - 0,5m

Strain gauge beam operating within the range up to 20 kg, (approx. 200 N). Used e.g. for kitchen scales, portable scales. The connection cable is terminated with terminals with...
5.0 (4)
Index: SES-03522
Index: SES-03522
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Tensometric beam NA27 2kg (20N)

Strain-gauge beam operating in the range of up to 2 kg (20 N approx.). It is applied, for example, for kitchen scales, portable scales. The connecting cable has tips with the...
5.0 (1)
Index: SES-03533
Index: SES-03533
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Regular price €11.00 Price €11.00

OpenScale - strain-gauge bridge ATmega328P - SparkFun SEN-13261

Module for measuring the weight and temperature. It is used to read data from the strain-gauge sensors. It allows for calibration, setting the sampling frequency and accuracy....
Index: SPF-07276
Index: SPF-07276
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Regular price €43.90 Price €43.90

Load Sensor Combinator (Ver. 1.1) - SparkFun BOB-13878

The module allows you to connect 4 load sensors - strain-gauge beams to one of the bridge via 4-wire cable. It finds application, for example, in the construction of the...
Index: SPF-07277
Index: SPF-07277
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Force sensor round 5mm (0.25 '') - short connector - Pololu 2727

Pressure sensor reduces its resistance when the force put to the round tip, increases. The sensor with the short connector, round, with about 5 mm diameter.
Index: PLL-02349
Index: PLL-02349
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Tensometric beam NA27 1kg (10N)

Strain-gauge beam operating in the range of up to 1 kg (approx. 10 N). The smallest version is used, for example, in kitchen scales, portable scales. The connecting cable has...
Index: SES-03097
Index: SES-03097
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FlexiForce Pressure Sensor - 100lbs - SparkFun SEN-08685

Pressure sensor reduces its resistance when the force put to its tip, increases. Sensor with a length of 216 mm, the maximum pressure is  approx. 45 kg.
Index: SPF-10112
Index: SPF-10112
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DFRobot Gravity - digital pressure sensor 1kg (10N)

Pressure sensor for Arduino works in the range of up to 1 kg. It is based on HX711, it has 24-bit analog-to-digital converter designed to scale weight and control applications...
Index: DFR-11280
Index: DFR-11280
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Regular price €19.50 Price €19.50

Force sensor FSR-406 - 2kg square 38mm - Pololu 1645

Force sensor changes its resistance when the force applied to the square tip, increases. The sensor in the form of a rectangle with side of 38 mm.
5.0 (1)
Index: PLL-01040
Index: PLL-01040
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Grove - force sensor FSR402 with module - 2kg

Module from the Grove series, is equipped with a sensor of pressure force FSR402. The sensor communicates with the analog voltage signal. It is able to detect a pressure in...
Index: SEE-12595
Index: SEE-12595
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Regular price €17.50 Price €17.50

Principle of operation of pressure sensors

The resistive pressure sensor (FSR) consists of two layers electrically insulated from each other. When a pressure force is applied to the outer layer in the form of a foil membrane, the insulating cover presses against the active layer, which is lined with electrically conductive measurement points. The greater the pressure force, the lower the contact resistance between the measurement points. The conductive layer is connected to a power source with auxiliary voltage, and the voltage signal, which reflects the applied pressure force, can be read, e.g. by Arduino, via an analog-to-digital converter and, based on the program algorithm, converted into the value of the weight exerted on the surface of the load cell. The measurement result can be displayed on the LCD display.

Important tips for installing strain gauges

Flat FSR sensors are made of very delicate material and great care is required when installing them. At the prototyping stage, it is easiest to connect such a sensor to the breadboard directly, or using crocodile clips or an ARK connector with screw terminals. However, if you want to solder the pressure sensor to the PCB, you must ensure that the soldering tip and the soldering surface are clean, because even within a few seconds the layers of the sensor may melt, causing permanent damage.

The compensating strain gauge is used to measure the pressure force taking into account the influence of external factors, primarily air humidity, temperature and atmospheric pressure.

The correct operation of the strain gauge sensor can be checked by supplying it with the appropriate voltage at nominal load and reading the output voltage value with an electric meter .

The resistance strain gauge uses the phenomenon of changing electrical resistance when changing the dimensions of the resistance material . Such devices are used, for example, to measure stress or pressure, for example in loading systems.