1. Product Introduction
The working principle of the micro-pressure differential transmitter is that the pressure of the medium acts directly on the sensor's diaphragm, causing the diaphragm to produce a micro-displacement proportional to the pressure of the medium, causing the sensor's resistance to change, and use electronic circuits to detect this change, and convert and output a standard signal corresponding to this pressure.
This product uses imported integrated chips, with wide voltage power supply, strong anti-interference ability, reverse connection protection, high accuracy, good stability, and can artificially correct zero points.
The micro-pressure differential transmitter obtains the pressure difference between air and non-corrosive gas, and is suitable for various industrial automatic control environment fields such as HVAC, dust-free clean workshop, pipeline air supply, boiler negative pressure, oven boosting, ventilation equipment, fan control, variable air volume system, etc.
2. Product device introduction
3. Model and description
4. Wiring method
V. Product Features
1. Linear pressure characteristics and selectable pressure measurement range
2. Working voltage: 16-30 VDC
3. Signal output: 4-20 mA / 0-5V / 0-10V/RS485 type
4. Zero adjustment
5. Simple and quick installation by integrated brackets inside the housing
6. Calibration and temperature compensation measurement signals
6. Application areas:
1. Measure subtle pressure difference in ventilation equipment and air conditioning ducts
2. Check air flow
3. Monitor filters and control fans
7. Model summary
unit: Pa
Product Series | Product Name | Pressure range measurement |
Measurement range 1 | Measurement range 2 | Measurement range 3 | Measurement range 4 | Overload pressure | Shock pressure |
BPS-01 | 100Pa Micro pressure differential transmitter | ±50Pa | - | ±65Pa | ±100Pa | ±10Kpa | ±20Kpa |
BPS-02 | 1KPa Micro pressure differential transmitter | ±250Pa | - | ±500Pa | ±1Kpa | ±10Kpa | ±20Kpa |
BPS-03 | 10KPa Micro pressure differential transmitter | ±2KPa | ±3KPa | ±5KPa | ±10KPa | ±85Kpa | ±110Kpa |
BPS-04 | 35Kpa Micro pressure differential transmitter | ±30KPa | ±35KPa | - | - | ±175Kpa | ±280Kpa |
8. Operation mode
The sensor obtains the pressure difference value through the silicon piezoresistive element, which forms a linear 4-20 through the sensed deviation value. mA/0-5V/0-10V/RS485 Type Temperature compensation output signal.
9. Mechanical Design
A micro pressure differential transmitter consists of the following:
1. Sensor housing fixing bracket, cable entry, movable buckle cover with safety screws
2. Silicon piezoresistive components are used for force measurement
3. Including terminals and for selecting measurement range DIP Printed circuit board for switches ( “See Debugging Precautions” )
4. Zero adjustment button ( “See Debugging Precautions” )
10. Precautions for debugging
Adjustable measurement range: pressure range and direction, adjustable through dial switch
Zero adjustment: clear and calibration
Open the panel short button (1Within seconds )The zero point adjustment button can be cleared.
(Please manually clear the zero while keeping it parallel to the installation method; please manually clear the zero while the positive and negative air intake ports are connected. )
Operation steps | state | result | button |
1. PCB Power on 2. Keep the pressure difference between positive and negative pressure air inlets at zero 3. Click 0 Click the key | The red light is on | 0 Point calibration | 
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11. Technical parameters
Product data:
Measurement range | Reference "Model Summary" |
Sensing elements | Silicon piezoresistive components |
Room temperature | 20-25℃ ，Measurement during correct installation (FS=Full range measurement ) |
Accuracy: Total error Temperature offset | ± 1 % /± 0.5 % / ±0.2% FS <±0.1% FS /°C |
medium | Air and non-corrosive gases |
Permissible medium temperature range | -20-85℃ |
maintain | Long-term stability |
Electrical characteristics:
All output types | power supply | Safe and ultra-low voltage |
Voltage Power consumption | DC16-30V <1.5 VA |
4-20mA Output Type | Output current | 4-20 mA |
load | ≤250 Ω |
Output | Non-electrical separation, polarity-free two-wire connection, rectifier bridge anti-reverse connection |
Link:
Electrical connection |
Screw terminal | Maximum 1.5 mm²cable |
cable | Cable sealing gland port (No resistance to cable deformation ) |
Pressure connection | Pressure nozzle, 6.21 mm diameter |
Environmental conditions:
Permissible ambient temperature |
run | -20-85℃ |
transportation / store | -40-125 ℃ |
Permissible ambient humidity | <90 % rh (No condensation ) |
12. Appearance size (long *Width *High: 99.0 *101.5*39.9mm, tolerance: ±1mm)
13. Installation method
First use the back ruler to mark the installation hole position on the wall, and the drilling depth is 30 mm of Ø6mm Place the expansion tube on the wall hole, then open the snap of the micro-pressure differential transmitter and turn on the cover
Cover, tap the screws (ST3.5×25) Fix the designated seat on the wall through the fixing hole of the micro-voltage differential transmitter, connect the inlet and outlet wires through the waterproof connector, and finally cover the cover.
Notice:
No air duct connection device is provided during supply;
Please read the instructions carefully and follow the wiring diagram. If the product is damaged due to wiring, it cannot be warranted.
