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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
HACH31591TC Orbisphere Nitrogen (N₂) TC sensor with hydrogen purge, protection cap, ext. temp. sensor (20 bar) Special offer 
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  • Weight
  • 0.95 kg
  • What's included?
  • Sensor only.Controller, sensor cable, flow-chamber or process connection must be ordered separately.
HACH9253900 Sensor guard for LDOsc Model 2 220 
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HACH1000F1062-001 GLI Model 33 Bezel 34 
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HACH6M0920 Silicone Lubricant 10 
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HACH9523.99.01P4 Polymetron 9523 Specific and Cationic Conductivity Analyser, and pH Calculator with Modbus Communication, 100-240 VAC Special offer 
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  • Altitude
  • < 2000 m
  • Analog Output Functional Mode
  • Linear, Logarithmic, Bi-linear, PID
  • Communication Capabilities
  • Modbus RS232/RS485
  • Conduit Openings
  • 1/2" NPT Conduit
  • Display
  • Graphic dot matrix LCD with LED backlighting, transreflective
  • Enclosure Rating
  • IP66 / NEMA 4X
  • Flow
  • 83 - 333 mL/min (5 - 20 L/h)
  • Material Enclosures
  • PolycarbonateAluminium (powder coated)Stainless Steel
  • Operating Temperature Range
  • 0 - 60 °C at 0 - 95 % RH (non-condensing)
  • Power Requirements (Voltage)
  • 100 - 240 VAC
  • Range
  • 7 - 10 pH for Ammonia
  • Relays
  • Four electromechanical SPDT (Form C) contacts, 1200 W, 5 A
  • Storage Conditions
  • -20 to 70 °C
  • Warranty
  • 12 months
  • Weight
  • 15 kg
  • What's included?
  • Panel, Controller, Resin Cartridge, Conductivity Electrodes (2), Basic User Manual
HACH9525.99.10CCDG Hach 9525sc DCCP System with Specific Conductivity (SC), Cation Conductivity (CC), Calculated pH, Degassed Cation Conductivity Special offer 
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  • Enclosure Rating
  • IP66 / NEMA 4X
  • Flow
  • 100 - 150 cc/min (mL/min); 6 - 9 L/h
  • Operating Temperature Range
  • Recommended operating temperature: 23 - 27 °C (75 - 80 °F)
  • Parameter
  • Degassed Cation Conductivity, Specific Conductivity, Cation Conductivity, Calculated pH
  • Power Requirements (Voltage)
  • 110 - 120 VAC
  • Storage Conditions
  • 0 - 50 °C (32 - 120 °F)0 - 85 % relative humidity, non-condensing
  • Warranty
  • 12 months
  • Weight
  • 50 kg (110 lbs)
  • What's included?
  • Kit includes (1 ea.): 9525.99.0010 9525sc Degas System, 9523.99.09P2 Hach 9523sc Specific and Cationic Conductivity Analyzer, and pH Calculator, with 5x 4-20 mA Outputs, 100-240 V AC, 9525.99.7040 Degas System Extension Panel Kit
HACH08310=A=0000 8310 Conductivity Sensor 645 
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  • Length
  • 119.5 mm
  • Material
  • Black PSU, 316L Stainless Steel
  • Measuring Principle
  • 2-electrode contacting conductivity
  • Operating Temperature Range
  • 125 °C maximum
  • Pressure Range
  • 10 bar maximum
  • Range
  • 0.01 - 20 µS/cm SC controller
  • Warranty
  • 6 months
  • What's included?
  • 8310 Conductivity Sensor, User Instructions
HACH5738901 Filtrax sample filtration system, 2 m unheated hose, 230 Vac 8400 
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  • Certifications
  • CE, UL, CSA
  • Dimensions
  • Control unit: 370 x 510 x 220 mm (W x H x D)| Module carrier: 340 x 500 x 92 mm (W x H x D)
  • Enclosure Rating
  • IP55
  • Outputs
  • Two programmable potential free contact (115V or 230V, max. 3 A)
  • Power Requirements (Voltage)
  • 230 VAC
  • Sample Volume
  • 900 mL/h
  • Warranty
  • 12 months
  • Weight
  • 9 kg
  • What's included?
  • Filtration system, module holder, delivery hose, user manual
LXV440.99.20002 N-ISE sc Low cost ISE Nitrate probe (immersion) with RFID, 10 m cable 8647 
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  • Cable Length
  • 10 m fixed cable at sensor, available up to 100 m
  • Calibration Method
  • With Cartrical plus technology: automatic import of factory calibration data from cartridge to probe by RFID*; 1 and 2 point matrix correction
  • Flow
  • 4 m/s max.
  • Length
  • 320 mm
  • Material
  • Cartridge: Stainless steel (1.4571), PVC, POM, ABS, NBR
  • Operating Temperature Range
  • -20 - 45 °C (-4 - 113 °F)
  • Parameter
  • NO3-N
  • Protection Class
  • IP68
  • Range
  • 0 - 1000 mg/L NO3-N
  • Repeatability
  • ± 5 % + 0.5 (with standard solution) NO3-N
  • Storage Conditions
  • 5 to 40 °C (41 to 104 °F) sensor cartridge
  • Warranty
  • 12 months
  • Weight
  • 2.4 kg
  • What's included?
  • Nitrate probe, sensor cartridge, user manual
HACH08362=A=2100 ORP Electrode for 8362 Ultrapure Water Sensor 788 
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  • Warranty
  • 6 months

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