Vacuum switches are devices that function after reaching a certain edge of pressure range. They control the compression of gas or liquid and can be used in pneumatic, electro-mechanic, and solid-state systems. Typically, those are installed in harsh conditions thanks to withstanding pressure and temperature (from -65°F to +225°F) fluctuations.
How do they work?
When it comes to general construction, vacuum relay is more complicated than its mechanic counterparts. It consists of chips, sensor, controlling parts, and the major detail called strain gage. It defines the degree of pressure by various methods depending on the form of sensor installed. Once the allowed pressure range is exceeded, the device activates the conditioning system. It either sends electronic signals or connects to an electro-mechanic circuit to turn the HVAC on/off.
Features and Benefits
The construction of vacuum pressure switches varies, and some are customized. Various sensing technologies are leveraged starting from a simple piston and finishing by piezoelectric and vibrating elements. Advanced models come with extra features, such as graphic, LED display, and even mathematical calculations. A typical gadget measures such aspects as heat and the level of vibration.
Also, vacuum relays include:
- 4-20 mA current loop;
- Tension gage;
- Switched AC/DC volts;
- Force tracking;
- Data logging capability.
Why some users choose them?
- They withstand serious temperature fluctuations and high/low pressure.
- A high measuring precision is ensured.
- Such constructions can be installed in industrial HVAC systems, as well as pumps, fans, etc.
- Reliability & durability.
- A wide range of extra options including data tracking.
- Weather-proof and can be used underwater.
This is the most versatile option for both fans and pumps: the device helps to prevent leakage, breaks, and other potential problems. To top it off, pressure controller allows saving on electric energy.
Need to purchase a vacuum switch? Discover a large variety of models in our catalogue. If you have some questions, contact us – we will help you figure out a suitable option.