About Trafag NSL 8257 Electronic Pressure Switch
They are available in many different designs to suit pressure and electrical connections, measuring procedures, electrical output signals and certifications (CE, EX, rail and ship).

Superior technology and precise manufacturing ensure that the transmitters work perfectly. This is especially important in applications where high requirements are placed on long-term stability, vibration resistance, electromagnetic compatibility, shock resistance or temperature insensitivity.
Description of NSL 8257 Electronic Pressure Switch
The very compact NSL low pressure transmitter is the only pressure transmitter in the market with thin-film-on-steel-membrane and pressure ranges down to 0 … 200 mbar. This combination allows also for low pressure ranges accurate measurements with excellent longterm stability. Through the extraordinary high burst pressures up to 125 times nominal pressure the NSL is the first choice for critical applications.
Feature of NSL 8257 Electronic Pressure Switch
- Smallest design
- Relative or absolute pressure measurement
- Excellent temperature resistance
- Improved vibration resistance
- Completely welded steel sensor system without additional seals
Application of NSL 8257 Electronic Pressure Switch
- Shipbuilding: Pressure monitoring in marine systems requiring devices with marine approval.
- Machine Manufacturing: Pressure measurement in hydraulic and pneumatic systems in industrial machinery.
- Machine Tool: Pressure monitoring in precision machine tools.
- Process Technology: Pressure measurement in various industrial processes.
- Water Treatment: Pressure monitoring in water treatment and distribution systems.
- Test Bench: Pressure measurement in testing and calibration applications.
Specification of NSL 8257 Electronic Pressure Switch
- Measurement Range: 0 to 0.2 bar to 0 to 2.5 bar (0 to 3 psi to 0 to 30 psi).
- Measurement Principle: Thin-film-on-steel.
- Accuracy at 25°C: ±0.15% to ±0.8% FS (typical).
- Output Signal: 4 to 20 mA, 0 to 5 VDC, 0 to 10 VDC, 0.5 to 4.5 VDC ratiometric.
- Electrical Connections: Industry standard with 9.4 mm contact spacing; M12x1; MIL-C 26482.
- Process Connections: G1/4“ male; 1/4” NPT male; 1/4“ NPT female; 9/16”-18UNF male, SAE6 (J1926).
- Media Temperature: -40°C to +125°C.
- Approvals/Standards: DNV-GL.
Sources : www.trafag.com
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