Product Description
Applications :
- Wastewater technology
- liquid level measurement
- pump control
- medical technology
- and many more
Technical Data :
Setting ranges:
| Type | Setting range between | Maximum positive working pressure Standard/extended | Maximum negative working pressure Standard/extended |
| 901.61 Ex | 5 und 20 mbar | 0,5/4 bar | /1 bar |
| 901.62 Ex | 10 und 50 mbar | 0,5/4 bar | /1 bar |
| 901.63 Ex | 25 und 100 mbar | 0,5/4 bar | /1 bar |
| 901.64 Ex | 50 und 250 mbar | 1/4 bar | /1 bar |
| 901.65 Ex | 100 und 500 mbar | 1/4 bar | /1 bar |
| 901.66 Ex | 250 und 1.000 mbar | 10 bar | 1 bar |
| 901.67 Ex | 500 und 1.500 mbar | 10 bar | 1 bar |
| 901.68 Ex | 1.000 und 3.000 mbar | 10 bar | 1 bar |
| 901.91 Ex | 1,0 und 6,0 bar | 25 bar | 1 bar |
| 901.92 Ex | 4,0 und 9,0 bar | 25 bar | 1 bar |
| 901.93 Ex | 7,0 und 12,0 bar | 25 bar | 1 bar |
| 901.71 Ex | 5 und 20 mbar | 0,5/4 bar | 1 bar |
| 901.72 Ex | 10 und 50 mbar | 0,5/4 bar | 1 bar |
| 901.73 Ex | 25 und 100 mbar | 0,5/4 bar | 1 bar |
| 901.74 Ex | 50 und 125 mbar | 0,5/4 bar | 1 bar |
| 901.75 Ex | 75 und 200 mbar | 1/4 bar | 1 bar |
| 901.76 Ex | 100 und 300 mbar | 1/4 bar | 1 bar |
| 901.77 Ex | 200 und 500 mbar | 1/4 bar | 1 bar |
| 901.78 Ex | 300 und 700 mbar | 1/4 bar | 1 bar |
| 901.81 Ex | 5 und 20 mbar (Differenzdruck) | 100 mbar | 100 mbar |
| 901.82 Ex | 10 und 50 mbar (Differenzdruck) | 100 mbar | 100 mbar |
- Temperature range:
Temperature of media and ambient temperature from -20C to 85C
Storage temperature: -40 C bis +85 C
- Diaphragm material:
Depending on media NBR, Silicone, FKM (Viton), EPDM. For 901.8x Silicone, others upon request.
- Pressure connection:
Material: PA, PVDF, PPS, 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)
Rugged and Accurate PerformanceConstructed with die-cast aluminium and an epoxy coating, the Pressure switch 901 Prescal EX is engineered for harsh environments. Its IP65 rating guarantees protection against dust and water, while the explosion-proof design is suited for demanding industrial settings. High repeatability and 1% full-scale accuracy assure consistent process control, supporting complex automation requirements.
Versatile Monitoring and ControlWith an adjustable pressure range of 0.5 to 10 bar and compatibility for air, oil, and non-aggressive gases, this switch adapts to various applications. The SPDT micro switch supports a high electrical load, making integration with a wide array of control systems straightforward. An external set screw allows convenient onsite pressure adjustment.
Flexible Installation and UsageThe compact, standard-sized design and 1/4 BSP female connection promote ease of installation across diverse systems. The ability to mount in any position enhances installation flexibility, while robust temperature resistance and reliable weatherproofing extend the operational life and reduce maintenance effort.
FAQs of Pressure switch 901 Prescal EX adjustable:
Q: How do I adjust the pressure setting on the 901 Prescal EX pressure switch?
A: You can adjust the pressure set point using the external set screw located on the housing. This feature allows for quick and precise on-site calibration without the need to open the enclosure.
Q: What benefits does the die-cast aluminium, epoxy-coated enclosure provide?
A: The die-cast aluminium construction with epoxy coating ensures superior weatherproofing (IP65 protection) and explosion-proof safety, making it suitable for demanding industrial environments prone to dust, moisture, and hazardous atmospheres.
Q: What types of media are compatible with this pressure switch?
A: The switch is designed for use with air, oil, and non-aggressive gases, making it versatile for a wide array of industrial automation and process control applications.
Q: Where can the pressure switch be installed within a system?
A: Thanks to its flexible design, the pressure switch can be mounted in any position, and its compact size with a 1/4 BSP female connection allows easy integration into existing or new installations.
Q: When is it ideal to use the 901 Prescal EX pressure switch?
A: This switch is ideal for environments that demand high repeatability and precise pressure monitoring and control, especially within the adaptable pressure range of 0.510 bar and temperatures from -25C to +80C.
Q: What is the typical process for integrating this pressure switch into an automation system?
A: Integration is straightforward: Mount the switch to your system using the 1/4 BSP connection, connect the electrical terminals to your control circuit (using the SPDT micro switch rated at 16A, 250VAC), and use the external set screw for precise pressure adjustment.
Q: What advantages does the high repeatability offer in industrial automation?
A: High repeatability ensures reliable switching and consistent process control, reducing the risk of system errors and enhancing overall operational efficiency in automated applications.