This guide will help you choose a digital pressure sensor for your application and explain the benefits of using a digital interface to transmit pressure readings.
There are many types of digital signal such as RS485, RS232, Modbus RTU, USB, SDI-12, I²C & IO-Link, but they all fundamentally transfer pressure readings without any loss of accuracy, and are the preferred type of pressure sensor for measuring pressures in calibration & test laboratories.
Products
Select a type of digital pressure sensor from the list below to view product choices and download product information or request a price quotation.
RS485 Serial Interface Pressure Sensors - RS485 output pressure sensors for incorporating into digital sensor networks. These sensors can be allocated a unique device address and connected in series to other sensors with RS-485 serial interfaces on the same communications link.
Pressure Sensors for Data Logging with a Computer - Digital pressure sensors for connecting to a desktop or laptop computer and logging air and liquid pressures at preset intervals.
Vacuum Digital Interface Pressure Sensors - Vacuum range digital pressure sensors with serial interface offer precise pressure measurement and convenient data acquisition for vacuum applications in industrial and research environments.
Digital Interface Air Pressure Sensors - Digital air pressure sensors are essential tools for accurately measuring and monitoring compressed air and air flow in a wide range of industrial and research applications.- Low Range Digital Interface Pressure Sensors - Low range digital pressure sensors with RS485, RS232, and USB interfaces provide high-accuracy measurements of differential or vented gauge pressures in applications with minimal pressure variations.
Digital Interface DP Sensors - Explore our range of differential pressure sensors featuring RS485, RS232, and USB digital interfaces.
High Range Digital Interface Pressure Sensors - These sensors combine the ruggedness required for demanding hydraulic applications with the accuracy and convenience of digital data acquisition
High Accuracy Digital Interface Pressure Sensors - Digital output pressure sensors with high accuracy measurement via RS485, USB and RS232 interfaces at room temperature and over the operating temperature range.
High Range USB Pressure Sensors - High-range pressure sensors with USB connectivity combine the ruggedness required for demanding high-pressure applications with the convenience and speed of digital data acquisition.
Low Range USB Pressure Sensors - Low range USB pressure sensors are suitable for monitoring pressure in cleanrooms, HVAC systems, and filter monitoring, among other applications.- High Speed USB Pressure Sensors - High-speed USB pressure transducers provide rapid pressure measurements and transmit data directly to a computer via a USB interface.
- RS232 Serial Interface Pressure Sensors - RS232 compatible pressure transducers for linking to PC computer serial ports.
- USB Pressure Sensors - Universal Serial Bus (USB) interface computer connection pressure sensing devices
- Modbus Communications Protocol Pressure Sensors - Pressure sensors with Modbus communications protocol for connecting to a serial bus or a digital sensor network.
Advantages of using digital pressure sensors
For the highest possible pressure sensor accuracy you will need an output signal which is not easily corrupted and has a very high resolution.
Reduce Signal Losses & Interference
Digital output signals do not suffer from signal losses or interference like analogue ones do, either the complete signal gets through as originally transmitted from the pressure sensor or none at all.
In order to achieve a high resolution on the output signal a relatively powerful analogue to digital converter is needed of at least 16 bit resolution to achieve precision levels better than 0.01% full scale.
Reduce Analogue to Digital Conversion Errors
Also there is no need to convert a digital signal to analogue at any stage between the pressure sensor and the display or logging instrumentation since it can be easily interfaced to a computer or data acquisition card via a digital connection.
Digital Error Compensation
Another benefit of digital output signals is that the microprocessor inside the digital pressure sensor can also be used to digitally characterise the pressure sensor over many pressure and temperature points virtually eliminating all linearity errors.
Exploit Repeatable & Stable Sensor Technology
However the ultimate accuracy of a digital pressure sensor is always going to be limited by the hysteresis and repeatability of the sensor technology utilised. Hysteresis and repeatability factors are very unpredictable and cannot be characterised easily.
So a digital output has the potential to provide the most accurate signal for a particular type of pressure sensor but it has to be used in conjunction with stable sensing technology which has naturally low hysteresis and repeatability characteristics for it to be truly accurate over its operational life.
Direct Computer Interfacing & Software Monitoring
RS485 is the most used interface for general applications and manufacturers will often supply desktop software for communicating with the digital pressure sensor via RS232 or USB converter boxes.
Select a digital pressure sensor for your application
Find a pressure sensor with a digital interface for connecting to a digital device or computer.
If you would like us to select a pressure transmitter for you, then please use this form to specify your requirements.
Digital Interface Type
Choose a digital interface type to select a digital pressure sensor.
Pressure Range Type
Pick the type of pressure range you wish to measure digitally.
- Low pressure
- High pressure
- Differential pressure
- Hydrostatic pressure
- Barometric pressure
- Absolute pressure
