Table of Contents In our daily lives, air itself exerts pressure, known as atmospheric pressure. Living at the Earth’s surface,
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Industrial Pressure Sensor
This pressure sensor features a compact form factor and are easy to install. The stainless steel housing provides isolation and corrosion protection, making them suitable for gases or liquids that are compatible with the wetted materials. They support gauge, vacuum, and absolute pressure measurements. An optional Hirschmann connector is available to simplify field wiring.
- Model: RK-PM301-*-N01-*-EX
- MOQ: 1 PCS
- Delivery date: within 24 hours
- Price: $33~$88
About - Pressure Sensor
Our pressure sensors use the standard ModBus RTU communication protocol and an RS485 output interface, enabling seamless integration with PLCs, configuration software, HMI panels, and industrial controllers. You may also choose our network-based concentrator, which uploads data from the monitoring host to our free cloud platform, allowing you to view real-time data, historical trends, and alarm records through a computer or mobile app. If you select a model equipped with buttons and a display, you can directly modify parameters such as device address and baud rate through the onboard interface.
Features
A pressure sensor is a device that detects applied pressure and converts it into an electrical signal, with the signal level corresponding to the magnitude of the pressure. Our RK-PM301-*-N01-*-EX pressure sensor is equipped with a stainless steel diaphragm piezoresistive sensing element. Laser trimming technology is used to compensate zero drift and temperature characteristics, and each component, semi-finished unit, and final product undergoes rigorous testing. The sensor is calibrated with imported high-precision pneumatic or hydraulic sources at multiple points to ensure high accuracy and long-term stability.
This pressure sensor is equipped with reverse-polarity protection as well as instantaneous overcurrent and overvoltage protection, meeting EMI protection requirements. It also features robust overvoltage resistance, withstanding up to twice the rated pressure in short-term conditions. Its built-in automatic temperature compensation minimizes temperature drift and ensures high measurement accuracy. With a wide measurement range from -0.1 MPa to 60 MPa, it meets the requirements of most industrial applications.
The sensor includes an integrated keypad, allowing on-site configuration of communication address, baud rate, zero range, and full-scale range. Real-time pressure values are displayed for direct on-site calibration and commissioning.
Applications
The pressure sensor is suitable for the measurement of industrial process control pressure. Widely used in pressure measurement and control across industrial applications such as constant-pressure water supply, petroleum, chemical processing, metallurgy, power systems, and hydrology. For more details, please check the pressure sensor video.
Datasheets
| Power supply | 10~30V DC |
|---|---|
| Max. power consumption | 0.3W |
| Measure range | -0.1~60 MPa (optional) |
| Accuracy | 0.5%FS (default), 0.2%FS |
| Overload capacity | ≤2 times the measuring range (≤7MPa), ≤1.5 times the measuring range (≥7MPa) |
| Zero-point temperature error | ±0.75%FS, @35℃ |
| Full-scale temperature error | ±0.75%FS, @35℃ |
| Medium temperature | -40℃~75℃, -40℃~150℃ (high temperature type) |
| Working environment | -30℃~70℃ |
| Compensated temperature range | -10~70℃ |
| Measuring medium | Gases or liquids that are non-corrosive to stainless steel |
| Output method | RS485 |
Range
| Code | Range | Code | Range | Code | Range | Code | Range |
|---|---|---|---|---|---|---|---|
| 01 | 0-10kPa | 02 | 0-100kPa | 03 | 0-0.6MPa | 04 | 0-1MPa |
| 05 | 0-2.5MPa | 06 | 0-10MPa | 07 | 0-40MPa | 08 | 0-60MPa |
| 09 | -100-0kPa | 10 | -0.1MPa-1MPa | 11 | 0-1.6MPa | 12 | -0.1MPa-0.1MPa |
| 13 | 14 | 15 | 16 | ||||
| 17 | 18 | 19 | 20 | ||||
| 21 | 22 | 23 | 99 | Customizable range | |||
| Note 1: No marking indicates gauge pressure; absolute pressure needs to be specified separately. | |||||||
| Note 2: Ranges below 5kPa can only measure dry gases. | |||||||
| Note 3: For ranges ≥ 60MPa, only M20*1.5 thread is available. | |||||||
Model
| Company code | Type | Range | Output | Threaded connection | Wiring method | Accuracy class | |
|---|---|---|---|---|---|---|---|
| RK | |||||||
| PM301 | General-purpose digital display pressure sensor | ||||||
| PM321 | High-temperature digital display pressure sensor | ||||||
| PM351 | General-purpose digital display hygienic pressure sensor | ||||||
| PM354 | General-purpose high-temperature hygienic pressure sensor with digital display | ||||||
| 01-99 | Range code | ||||||
| N01 | 485 communication interface | ||||||
| M20 | M20*1.5 standard thread (default) | ||||||
| M14 | M14*1.5 standard thread | ||||||
| K2 | G1/4 (2 points) pipe thread | ||||||
| K3 | G3/8 (3 points) pipe thread | ||||||
| K4 | G1/2 (4 points) pipe thread | ||||||
| K6 | G3/4 (6 points) pipe thread | ||||||
| KG | KG: Clamp-type installation (hygienic type, default) | ||||||
| JF: Hirschmann connector | |||||||
| A05 | 0.5 accuracy class | ||||||
| A02 | 0.2 accuracy class | ||||||
| A01 | 0.1 accuracy class | ||||||
Types
RK-PM300-*-N01-*-EX
It supports RS485 and analog output, making it suitable for most applications.
RK-PM301-*-N01-*-EX
It supports RS485 output and has a display, making it suitable for most locations.
RK-PM303-*-N01-*-EX
Supports RS485 output and has a display. It features an integrated mounting design.
RK-PM320-*-N01-*-EX
It supports RS485 output and is suitable for high-temperature environments.
RK-PM321-*-N01-*-EX
Supports RS485 output and has a display, suitable for high-temperature environments.
RK-PM350-*-N01-*-EX
It supports RS485 output and is suitable for places with strict hygiene requirements.
RK-PM351-*-N01-*-EX
Supports RS485 output with display, suitable for places requiring high hygiene standards.
RK-PM353-*-N01-*-EX
Supports RS485 output, suitable for high-temperature and hygiene-sensitive environments.
RK-PM354-*-N01-*-EX
RS485 output with display, suitable for high-temperature and hygiene-sensitive environments.
RK-PM400-EX
Model 2088 standard version, suitable for industries such as petrochemicals and metallurgy.
RK-PM402-*-N01-M20-JF-*-EX
Model 2088 LCD display type, suitable for industries such as petrochemicals and metallurgy.
RK-PM422-*-N01-*-EX
Model 2088 high-temperature LCD display, suitable for high-temperature environments.
Use
- Our pressure sensors are equipped with instructions for use and certificates of conformity. There are technical parameters, please check carefully to avoid mistakes.
- According to the pressure sensor connection method and thread type, check whether the field interface is consistent with the product interface. When connecting, it should be tightened slowly. The torque cannot be directly applied to the transmitter housing. It can only be added to the hexagonal interface of the pressure interface. on. Ensure that the transmitter is mounted perpendicular to the ground. Use a wrench to tighten the transmitter from the hexagonal nut at the bottom of the transmitter during installation to avoid direct rotation of the transmitter.
- When connecting the power supply, it should be connected in strict accordance with the wiring instructions of our company.
- This pressure sensor is a precision instrument. It is forbidden to disassemble at will, to prevent collision and fall. It is strictly forbidden to touch the sensor diaphragm with a sharp object, thus causing damage to the core.
- The pressure sensor can be used after power-on. After preheating for 30 minutes, the output is more stable. If an abnormality is found during use, turn off the power, stop using it, check it, or contact our technical department directly.
- During the pressure measurement process, slowly pressurize and depressurize, avoid adding to high pressure or reduce to low pressure instantaneously. If measuring the pressure with faster change speed, install pressure buffer at the connection outlet of the transmitter and the measured medium.
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