Beck-930 Series Differential pressure switch

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 varian such as:

• Differential pressure switch 930 adjustable
• Differential pressure switch 930 EX adjustable
• Differential pressure switch 930 with UL approval adjustable

*All varians is adjustable from 20 to 5000 pascal.

Applications

Adjustable differential pressure switch for monitor ing 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 form --- to ---	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 con nection 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 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 6.3x0.8 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 contact 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 %