Adjustable differential pressure switch for monitoring overpressure, vacuum and differential pressure of air or other non-combustible, non-aggressive gases.
The switching pressure can be adjusted without a pressure gauge using a scaled adjustment knob. Various versions with overlapping adjustment ranges between 0.2 mbar and 50 mbar are available for this purpose. As standard, the pressure switch is equipped with a transparent cover of protection class IP54.
We have three variants such as:
- Differential pressure switch 930 adjustable
- Differential pressure switch 930 EX adjustable
- Differential pressure switch 930 with UL approval adjustable
*All variants is adjustable from 20 to 5000 pascal.
Applications
Adjustable differential pressure switch for monitoring overpressure, vacuum and differential pressure of air or other non-combustible, non-aggressive gases.
Possible fields of application include:
- Monitoring air filters and ventilators
- Monitoring industrial cooling-air circuits
- Overheating protection for fan heaters
- Monitoring flows in ventilation ducts
- Controlling air and fire-protection flaps
- Frost protection for heat exchangers
Version
With this pressure switch, the switching pressure can be adjusted without a pressure gauge using a scaled adjustment knob.
| Type | Adjustment range | Switchig diferential | Repeatability of the switching pressure |
| 930.80 | 20 – 200 Pa | 10 Pa | ±5 %, min. ±5 Pa |
| 930.80B | 20 – 300 Pa | 10 Pa | ±5 %, min. ±5 Pa |
| 930.84 | 30 – 400 Pa | 15 Pa | ±5 %, min. ±5 Pa |
| 930.83 | 50 – 500 Pa | 20 Pa | ±2.5 %, min. ±5 Pa |
| 930.85 | 200 – 1000 Pa | 100 Pa | ±1 %, min. ±5 Pa |
| 930.85B | 100 – 1000 Pa | 100 Pa | ±1 %, min. ±5 Pa |
| 930.86 | 500 – 2500 Pa | 150 Pa | ±1 %, min. ±5 Pa |
| 930.87 | 1000 – 4000 Pa | 250 Pa | ±1 %, min. ±5 Pa |
| 930.87B | 1000 – 5000 Pa | 250 Pa | ±1 %, min. ±5 Pa |
* typically, at beginning of setting range.
Switching pressure specifications apply to vertical installation which is also the recommended position with pressure-pipe connections pointing downwards. If the switches are installed horizontally with AMP connection terminals uppermost, the switching values are approx. 20 Pa higher.
Specification
Maximum operating pressure
10 kPa for all pressure ranges.
Medium
Air, non-combustible and non-aggressive gases.
Temperature range
Medium and ambient temperature from –20°C to +85°C. Storage temperature from –40°C to +85°C.
Diaphragm material
Silicone, tempered at 200°C, free of gas emissions. Other materials available on request.
Pressure connections
2 plastic pipe connection pieces (P1 and P2), external diameter 6.0 mm: P1 for connection to higher pressure (marked +) P2 for connection to lower pressure (marked –)
Housing materials
Switch body and a cover of plastic.
Weight
With cover 150 g, without cover 110 g.
Mechanical working life
Over 106 switching operations.
Electrical rating
Standard version: max. 1.5 A (0.4 A) / 250 VAC
Low-voltage version: max. 0.1 A / 24 VDC
Electrical connections
AMP flat plug 6.3×0.8 mm in accordance with DIN 46244 or push-on screw terminals. Cable conduit with cable strain relief.
Arrangement of contacts
1 Break contact 2 Operating contacts 3 Power supply line
Protection category
IP 54 with cover, IP 00 without cover.
CE Conformity
each depending on technical specification: Low Voltage Directive 2006/95/EC; RoHS Directive 2011/65/EC; Gas Appliance Directive 2009/142/EC; ATEX- Directive 2014/34/EC; ANSI UL508; CSA.
Specifications according to EN1854
Class of control and regulation function: A Deviation: ≤±15 %, min. ±10 Pa Drift: ≤±15 %