FISCHER NK101, Operating Manual, Page: 6 / 36

2 | Product and functional description FISCHER Mess- und Regeltechnik GmbH
6 / 36 BA_EN_NK10_H_ST4-C
2 Product and functional description
2.1 Delivery scope
▪ NK10 according to specification (see order code)
▪ Operating Instructions
2.2 Explosion hazard area classification
The fill level limiter NK10 … H can be used in areas at risk of explosion from
flammable gases or vapours Zone 1 and Zone 2.
The identification as per Directive 94/9/EC is:
II 2 G Ex ib c IIC T6 Gb
The fill level limiter NK10 … H can be used in areas at risk of explosion from
flammable dust Zone 21 and Zone 22.
The identification as per Directive 94/9/EC is:
II 2 D Ex tb c IIIC T80 °C Db
WARNING
Installation regulations
The respective installation instructions must be observed for every application
case.
2.3 Function diagram
1
2 3
6
4
9
8 7
10
approx. 10 mm
approx. 60 mm
5
Illustration 1: Function diagram
1 Swimmer 2 Swimmer rod
3 Metal bellows 4 Test button
5 Switch lever 6 Micro-switch S1
7 Cable screw connection 8 Flange and counter-flange
9 Welding socket 10 Tank