NAR 8258 – Railway Pressure Switch

The pressure switch NAR 8258 with 1 or 2 switching outputs and increased accuracy of 0.3 % was specifically designed for railway vehicles (EN 50155) and has a long-term stable thin-film-on-steel sensor cell. The wide temperature range from -40°C to +125°C and the triple overpressure protection make the NAR 8258 the ideal choice for railway vehicles in rough environmental conditions.

Features

Measuring accuracy 0.3 %
1 or 2 PNP transistors
Parameterization via smartphone App (Android)
Switching current up to 400 mA
Dielectrical strength: 710 VDC, meets EN 50155 (Railways)

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Technical Data

Applications	Railways
Category	Electronic pressure switches
Accuracy @ 25°C typ.	± 0.3 % FS typ.
Measuring principle	Thin-film-on-steel
Approval / conformity	EN 50155 (Railway) EN 45545-2 (Fire protection) EN 61373 (Shock, vibration) EN 50121-3-2 (EMC)
Vibration	15 g RMS (20...2000 Hz) (EN60068-2-64) 25 g sin (80...2000 Hz), 1 oct./min, (1x @ 25°C) (EN60068-2-6)
NLH @ 25°C (BSL) typ.	± 0.2 % FS typ.
Pressure connections	G1/4" m; G1/4" m (Manometer); 1/4"NPT m; 7/16"-20UNF m, SAE4 (J1926); R1/4" m, DIN2999; M10x1 m, DIN EN ISO 6149-2; M12x1.5 m, DIN EN ISO 9974-2
Media temperature	–40°C ... +85°C
Shock	50 g / 11 ms 100 g / 6 ms Male electrical plug M12x1 (EN60068-2-27) ³⁾
Electrical connections	M12x1
Long term stability 1 year typ.	< ± 0.1 % FS typ.
Ambient temperature	EN 50155: OT6 (–40°C ... +85°C)
Protection	IP67, IP68
Output signal	Switching output: 1 or 2 PNP transistors
TEB typ. @ -25 ... +85°C	± 1.0 % FS typ.
Measuring range	0 ... 6 to 0 ... 600 bar 0 ... 100 to 0 ... 7500 psi