[Door Safety Sensors] - Barometric pressure switch
Product Advantage
Pressure wave technology for high switching reliability and longevity
Operating air pressure 2mbar, high sensitivity, fast response
Maximum air pressure 150 mbar, wide range of pressure fluctuations
Operating voltage 24-250V AC / 24-50V DC, compatible with various control systems
Operating temperature -30℃ ~ +70℃, adapt to the extreme environment
Maintenance-free design, rugged and simple construction
Millions of devices have been successfully put into use, market validation
Applicable Scenarios
Automatic doors, automatic gates, rapid rolling doors, industrial sliding doors and other air pressure-sensitive safety protection scenes.
Selection Support
For selection advice or technical support, please feel free to contact us.
Air pressure switch DW40
Product Number:SD-DW-001 Technical parameters:- Operating air pressure: 2 mbar
- Maximum air pressure: 150 mbar
- Minimum/maximum current: 20 mA/500 mA
- Operating voltage: 24-250 V AC, 24-50 V DC
- Signal type: NC or NO
- Operating temperature: -30°C to +70°C
Air pressure switch DW50
Product Number:SD-DW-002
Technical parameters:
- Operating air pressure: 2 mbar
- Maximum air pressure: 150 mbar
- Minimum/maximum current: 20 mA/500 mA
- Operating voltage: 24-250 V AC, 24-50 V DC
- Signal type: NO
- Operating temperature: -30°C to +70°C
Description:Maintenance-free, robust and time-tested, extremely fast closing speed, Swiss pressure wave technology, high switching reliability, simple and robust structure, millions of units have been successfully put into use.
📋 Frequently Asked Questions and Troubleshooting
The following FAQs and troubleshooting methods for DW40/DW50 pressure wave switches will help you solve problems quickly.
1. Q: What is the operating principle of the DW40/DW50 pressure wave switch? What is the starting pressure?
Answer: DW40/DW50 pressure wave switches are used in conjunction with pneumatic safety contacts. When the safety contact (rubber hose) is squeezed, the internal air generates a pulsating pressure wave, which is transmitted to the pressure wave switch through the connecting hose, and the internal pressure membrane expands to switch the contacts.Start-up pressure of only 2 mbarThe extremely high sensitivity provides reliable anti-bump and anti-squeeze protection when the door is closed.
2. Q: What is the main difference between DW40 and DW50? How to select the model?
Answer: The core technical parameters of DW40 and DW50 are the same, the main differences areOutput type：
- DW40: NC (Normally Closed) or NO (Normally Open) selectable, suitable for control systems that require flexibility in selecting the type of contact;
- DW50: NO (normally open) for simplified applications where only a normally open signal is required.
common parameter: Starting pressure 2mbar, maximum pressure 150mbar, operating voltage 24-250V AC / 24-50V DC, operating current 20-500mA, mechanical life 50 million times, operating temperature -30℃ to +70℃.
Suggestions for selectionFor flexible selection of normally open/closed outputs, select DW40; for applications requiring only normally open signals, select DW50.
3. Q: How can I troubleshoot the DW40/DW50 pressure wave switches that are unresponsive and do not trigger a signal after installation?
Answer: Please troubleshoot in the following order:
- ① Check the air pressure line: Verify that the connecting hose between the rubber hose and the pressure wave switch is free of bends and leaks, and that the ventilation is smooth;
- ② Check the sensitivity setting: Reduce the starting pressure threshold by increasing the sensitivity appropriately through contact points (K) and valve screws (V);
- ③ Check electrical connections: Verify that the wiring is correct and that the operating voltage is within the rated range (24-250V AC / 24-50V DC);
- ④ Check the condition of the rubber hose: Confirm that the rubber hose is not damaged or clogged, and that a pressure wave is generated normally when squeezed;
- ⑤ Check the mounting position: Verify that the pressure wave switch is securely mounted and that the mating housing protective cover is properly closed.
4. Q. Will the DW40/DW50 pressure wave switches work properly in harsh environments (humidity, dust)?
Answer: DW40/DW50 can be matched.Crash housings (e.g. GEHDWGK1)The protection level is up toIP65(dust and water spray resistant), suitable for harsh industrial environments such as humidity and dust. The housing is made of impact-resistant plastic, strong and durable. The matching pneumatic safety contact rubber hose is made of PVC and has good weather resistance. For special environmental requirements, a sealed model with balanced air pressure holes is available as an option.