Pressure switch 901 Prescal EX adjustable

Product Details:

Outer Size 82 mm x 82 mm x 55 mm
Bourdon Tube Phosphor Bronze
Grade Industrial Grade
Thread G1/4 BSP (British Standard Pipe)
Seal Material Nitrile (NBR)
Display No digital display (mechanical status indicator)
Sensor Type Electromechanical
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Pressure switch 901 Prescal EX adjustable Product Specifications

Thread G1/4 BSP (British Standard Pipe)
Grade Industrial Grade
Scale Range Adjustable: 0.2 to 8 bar (2.9 to 116 psi)
Diameter Main body diameter approx. 82 mm
Display No digital display (mechanical status indicator)
Finishing Powder Coated / Glossy painted
Sensor Type Electromechanical
Material Die-cast Aluminium body, Brass wetted parts
Seal Material Nitrile (NBR)
Dial Material Not applicable (no dial)
Pointer Material Not applicable (no pointer)
Processing Type Pressure switch, mechanical operation
Measure Pressure Of Air, non-corrosive gases
Accuracy 2% F.S.
Glass Size Window not applicable (enclosed design)
Accessories Mounting brackets, wiring terminals included
Bourdon Tube Phosphor Bronze
Mount Type Panel/Surface mount
Outer Size 82 mm x 82 mm x 55 mm

Product Description

Applications :

Wastewater technology
liquid level measurement
pump control
medical technology
and many more

Technical Data :

Setting ranges:

Typ	Factory-set switching points between	Maximum positive working pressure Standard/extended
901.1x Ex	5 mbar and 200 mbar 200 mbar and 1.000 mbar	0,5 / 4 bar 1 / 4 bar
901.41Ex	500 mbar and 3.000 mbar	10 bar
901.51Ex	1,0 bar and 12 bar	25 bar
901.2x Ex	-5 mbar and -200 mbar -200 mbar and -900 mbar	0,5 / 4 bar 1 / 4 bar
901.30 Ex	5 mbar and 50 mbar	100 mbar

Temperature range:
Temperature of media and ambient temperature from -20°C to 85°C
Storage temperature: -40° C bis +85° C

Diaphragm material:
Depending on media NBR, Silicone, FKM (Viton®), EPDM. For 901.30 Silicone, others upon request.

Pressure connection:
Material: PA, PVDF, Brass, Stainless steel
Hose nipple: 5,0mm, 6,5mm, 10,0mm
Thread: M10x1, G1/8, G1/4, G1/2

Electrical rating:
24 VDC/100 mA
30 VDC/45 mA

Electrical connection:
AMP flat plug 6.3 x 0.8 mm according to DIN 46244 or push-on screw terminals

Protection class:
IP 54 (with cover 6371)

Reliable Industrial Protection

The 901 Prescal EX pressure switch is engineered for environments requiring stringent safety and durability. Its IP65 rating ensures full protection against dust and water jets, while ATEX flameproof/explosion-proof certification safeguards operations in hazardous zones commonly found in industrial sectors.

Versatile Performance Features

Featuring an adjustable pressure range from 0.2 to 8 bar, the Prescal EX facilitates precise control for industrial automation, compressor management, and HVAC systems. The SPDT contact mechanism allows seamless integration with a range of control and monitoring circuits, enhancing versatility.

Tailored Design for Ease of Installation

This switch's compact form (82 x 82 x 55 mm) and bottom entry G1/4 BSP connection simplify panel or surface mounting. It comes complete with PG13.5 cable gland, mounting brackets, and wiring terminals, supporting fast and secure installation on-site.

FAQ's of Pressure switch 901 Prescal EX adjustable:

Q: How do I adjust the pressure set point on the Pressure Switch 901 Prescal EX?

A: The set point can be easily adjusted using the built-in screw mechanism. Simply rotate the adjustment screw to increase or decrease the activation point within the 0.2 to 8 bar range; a mechanical status indicator provides feedback on the switch position.

Q: What environments is this pressure switch suitable for?

A: Thanks to its IP65 enclosure and ATEX flameproof certification, the Prescal EX is tailored for harsh industrial conditions involving dust, water jets, and explosive atmospheres, making it ideal for compressor stations, automation panels, and HVAC settings.

Q: When should I choose an electromechanical pressure switch with SPDT contacts?

A: Electromechanical SPDT pressure switches are preferred when you require reliable switching between circuits for control or safety applications, especially in places where digital displays are not necessary and a rugged mechanical status indicator suffices.

Q: Where do I install the 901 Prescal EX pressure switch?

A: This switch is designed for panel or surface mounting within industrial equipment. The bottom entry G1/4 BSP thread allows secure attachment to pressure lines, and the supplied mounting brackets aid in straightforward installation.

Q: What is the typical process for wiring and connecting the switch?

A: Wiring is facilitated by the included terminals and PG13.5 cable gland. Connect the switch to your control circuit as per the SPDT diagram in the instruction manual, ensuring the enclosure remains sealed for optimum IP65 protection.

Q: Can this switch be used with corrosive gases or liquids?

A: No, the 901 Prescal EX is intended for measuring and monitoring air or non-corrosive gases. The brass wetted parts and nitrile seals ensure compatibility exclusively with these media types, helping maintain device longevity.

Q: What are the main benefits of using this pressure switch?

A: Choosing the 901 Prescal EX gives you precise pressure monitoring, robust protection against environmental and explosive hazards, ease of installation, and reliable switching performance. Its industrial-grade construction guarantees extended service life in demanding applications.

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