Hach GS2440EX, User Instructions, Page: 9 / 214

4.3 Install the sensor
D A N G E R
Gas exposure hazard. Hydrogen sulfide is a highly toxic gas. Put on the personal protective
equipment identified in the safety data sheet (MSDS/SDS). Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
Refer to the GS1440, GS2440EX H
2
S Sensor User Manual .
Grounding the sensor may be necessary if electrostatic build up can occur based on the information
given in
Intrinsically safe installation requirements on page 8. The risk of electrostatic build up is low
in an atmosphere with high humidity or when the sensor is immersed in water. If the sensor will be
connected to ground, refer to
Figure 1 .
Figure 1 Sensor grounding connections
4.4 Approved GS2440EX installation drawing
D A N G E R
Any installation or sensor configuration that is not specifically detailed on the following control drawing
is not allowed. In all cases, the local authority having jurisdiction shall have the final say.
Figure 2 is the approved hazardous location "control" drawing for the GS2440EX sensor. This
certified drawing shows the ONLY approved method of installing the GS2440EX sensor. Any
substitutions will automatically void the intrinsically safe certification of the GS2440EX sensor and
could cause a fire or explosion.
English 9