Table of Contents Did you know? Atmospheric pressure is constantly influencing the natural phenomena around us—everything from the direction of
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Atmospheric Pressure Sensor
This atmospheric pressure sensor adopts an imported high-precision measuring unit. The device has built-in high-precision temperature compensation, high stability, low drift, and high repeatability. It can be easily fixed to the wall by wall-mounted housing. It is suitable for places where atmospheric pressure measurement is required, such as altimeters, agricultural greenhouses, weather station, archives, etc.
- Model: RS-QY-*-2D-LCD-EX
- MOQ: 1 PCS
- Delivery date: within 24 hours
- Price: USD 28.30
Renke Atmospheric Pressure Sensor
RS-QY-*-2D-LCD-EX atmospheric pressure sensor measures a wide range of 0-120kPa air pressure, which can be applied to various altitudes. The measured data can be directly displayed on the LCD screen or uploaded to the free cloud platform via RS485 signal. Optional built-in temperature and humidity sensor can be used to monitor atmospheric pressure, temperature and humidity at the same time. The back of the atmospheric pressure sensor housing is equipped with a slide rail mounting plate, which supports wall mounting or guide rail mounting.
| Output | RS485 | 4~20mA/0~5V/0~10V |
| Power supply | 10~30V DC | |
| Max. power consumption | ≤0.5W | 1.2W |
| Measure range | 0~120kPa | |
| Accuracy | ±0.15kPa@25℃ 101kPa | |
| Operating temperature | -40℃~+60℃, 0%RH~95%RH (non-condensing) | |
| Long-term stability | -0.1kPa/year | |
| Response time | ≤2s | |
| Load capacity | — | resistance ≤ 250Ω, current ≤ 600Ω |
Our atmospheric pressure sensors
Atmospheric Pressure Sensor Wiring
The wide voltage power input is 10~30V. When wiring the 485 signal line, please note that the A/B lines cannot be connected in reverse, and the addresses of multiple devices on the bus cannot conflict.
Wiring Instructions
| Circuit identification | Description | |
|---|---|---|
| Power supply | VCC | Positive power supply (10~30V DC) |
| GND | Negative power supply | |
| Communication | 485A | 485-A |
| 485B | 485-B |
Register Address
| Register address | PLC or configuration address | Content | Supported function code | Description |
|---|---|---|---|---|
| 0000 H | 40001 | Air pressure (unit: kPa) | 0x03/0x04 | Real-time value (expanded 10 times) |
| 0051 H | 40082 | Air pressure calibration value | 0x03/0x04/0x06 | Integer (expanded 10 times) |
| 07D0 H | 42001 | Device address | 0x03/0x04/0x06 | 1~254 (factory default 1) |
| 07D1 H | 42002 | Device baud rate | 0x03/0x04/0x06 | 0 represents 2400 1 represents 4800 2 represents 9600 3 represents 19200 4 represents 38400 5 represents 57600 6 represents 115200 7 represents 1200 |
Power supply wiring
Wide voltage 10~30V DC power input. For 0-10V output type equipment, only 24V power supply can be used.
Output interface wiring
The standard equipment has 1 independent analog output. It is suitable for both three-wire and four-wire systems.
Wiring Instructions
| Circuit identification | Description | |
|---|---|---|
| Power supply | VCC | Power supply positive |
| GND | Power supply negative/signal negative | |
| Output | TH | Reserved |
| RH | Atmospheric pressure signal positive |
Current output signal conversion calculation
For example, the range is 0~120kpa, 4~20mA output, when the output signal is 12mA, calculate the current air pressure value. The span of this air pressure range is 120kpa, expressed by 16mA current signal, 120kpa/16mA=7.5kpa/mA, that is, 1mA current represents a pressure change of 7.5kpa, the measured value is 12mA-4mA=8mA, 8mA*7.5kpa/mA=60kpa. 60+0=60kpa, the current air pressure is 60kpa.
Voltage output signal conversion calculation
For example, the range is 0~120kpa, 0-10V output, when the output signal is 5V, calculate the current air pressure value. The span of this air pressure range is 120kpa, which is expressed by a 10V voltage signal. 120kpa/10V=12kpa/V, that is, a voltage of 1V represents a pressure change of 12kpa, and the measured value is 5V-0V=5V.5V*12kpa/V=60kpa. 60+0=20kpa, and the current air pressure is 60kpa.
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