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Water or air, measure H2S where it matters – right at the source.


Meet the new GS1440 and GS1440EX hydrogen sulfide sensors from Hach. Whether in water or air, you will have the direct H2S measurement you need to optimize your H2S treatment process and proactively control H2S before it causes issues.

Catalog No. Product Net Price
AHA033NPT probe adapter straight 1 1/2 FNPT 164 
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LZX439 Probe cable extension, 15 m Special offer 
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LZX437 Probe cable extension, 5 m Special offer 
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LXV541.99.1001H PAH500 Digital PAH Sensor, 1.0 m Cable, Bracket Special offer 
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  • Cable Length
  • 1 m
  • Certifications
  • EU CE MarkMaritime Type Approvals**: DNV-GL, ABS, Class NK, Japanese Government, Korean RegisterMarine Environment Protection Committee - MEPC.259(68)
  • Dimensions
  • Sensor Body (Ø x L): 76.2 x 145.1 mm (3.0 x 5.71 in)
  • Housing Material
  • Titanium
  • Operating Temperature Range
  • 5 - 55 °C
  • Parameter
  • PAH (polycyclic aromatic hydrocarbon)
  • Power Requirements (Voltage)
  • 12 VDC supplied by digital gateway
  • Range
  • 0 - 900 µg/L PAH / PHE (phenanthrene equivalents)
  • Temperature
  • 90 °C
  • Warranty
  • 12 months
  • Weight
  • 1 kg
  • What's included?
  • PAH500 Sensor, 1 m cable, mounting bracket, manual
MH376 Flow-Thru Mounting Hardware, PVC, pH/Orp 175 
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MH578N9AZ 148 
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MH578N9A 238 
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LZX914.99.11110 Stainless steel chain mounting set for FP360 sc 490 
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  • Length
  • 5000 mm
  • Material
  • Wetted parts: chain SS 1.4571 / 1.4401.
  • What's included?
  • Stainless Steel chain mount kit, see for single components attached instruction sheet.
LZX914.99.12400 Chain mounting for ANISE sc, AISE sc & NISE sc, PVC 492 
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  • Material
  • Wetted parts: chain PVC; piece of pole PVC; 45⁰ elbow adapter and reducer PVC.
  • What's included?
  • PVC chain mount kit, see for single components attached instruction sheet.
LZX914.99.11200 Chain mount kit for electrochemical sensor 612 
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  • Length
  • Chain length:5000 mm / 197.9"
  • Material
  • Stainless steel 1.4571
  • Special Notes
  • For the installation in tanks and open channels
  • What's included?
  • Stainless Steel chain mount kit, see for single components attached instruction sheet.

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