Hach GS2440EX, User Instructions, Page: 7 / 214

3.2 Product overview
D A N G E R
Do not use the GS1440 or GS2440EX sensor as a safety device to identify the hydrogen sulfide
concentration in an area. Obey all applicable regulations and occupational health and safety
precautions before entry into confined spaces and toxic hazard environments. Get advice from the
occupational health and safety department at the workplace or the government regulatory body to
identify the possible hazards and safety standards.
N O T I C E
The GS1440 sensor is not approved for use in hazardous locations.
The GS2440EX sensor continuously measures the hydrogen sulfide (H
2
S) concentration in liquids
(0–5 mg/L H
2
S) and air (0–1000 ppm H
2
S).
Section 4 Installation
D A N G E R
Explosion hazard. Trained personnel only must install or commission the equipment.
This chapter includes only the installation information for hazardous location use. For the installation,
operation, and replacement part and accessory information for non-hazardous location use, refer to
the
GS1440, GS2440EX H
2
S Sensor User Manual .
4.1 Precautions for hazardous location installations
D A N G E R
Obey all ATEX, UKEX, IECEx and North American Classification specifications as well as national
and local regulations. Obey the safety warnings of the other intrinsically safe (Ex) equipment installed
near the sensor.
D A N G E R
Explosion hazard. Installation into hazardous locations must be done so that no friction can be
generated between the sensor or field transmitter and any surrounding surfaces.
D A N G E R
Explosion hazard. To ensure safety, the installation of instruments in hazardous locations must follow
the specifications in the control drawings. Any modification to the instrumentation or to the installation
may result in life threatening injury and/or damage to facilities.
The GS2440EX sensor (LXV449.99.20000) is certified as intrinsically safe for North American Class
I, Division 1 or Class I, Zone 0 hazardous area for the gas group, protection method, equipment
protection level and temperature class, and the port parameters given in
Specifications on page 4.
As an alternative, the GS2440EX sensor is compliant with the EU ATEX Directive 2014/34/EU and
UK Statutory Instrument 2016/1107 (amended by UKSI 2019:696). The GS2440EX sensor can be
installed in a Zone 0 hazardous area and is identified as Equipment Group II, 1G equipment
category/environment in accordance with the intrinsic safety protection method/ level, atmosphere
group and temperature class given in
Specifications on page 4.
In addition, the GS2440EX sensor is compliant with the IECEx certification in accordance with the
specifications given in
Specifications on page 4.
The basic concept of protection utilized is limited energy of sparks and surface temperature.
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