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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
PRO-E3A1N PRO Series Transmitter, Electrodeless Conductivity 752 
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  • Display
  • 2-line by 16 character LCD
  • Material
  • Enclosure: Polycarbonate
  • Operating Temperature Range
  • -20 - 60 °C at 0 - 95% RH (non-condensing)
  • Parameter
  • Electrodeless Conductivity
  • Power Requirements (Voltage)
  • 12 - 30 V DC
  • Repeatability
  • ± 0.05 % of span, at 25 °C
  • Response Time T90
  • 60 s
  • Storage Conditions
  • -30 to 70 °C 0-95% Relative humidity, non-condensing
  • Warranty
  • 12 months
  • Weight
  • 0.280 kg
  • What's included?
  • Controller, User Manual
K1200-S00 Orbisphere K1200 LDO Oxygen sensor, 0 - 2000 ppb, 28 mm Orbisphere fitting Special offer 
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  • Certifications
  • 2004/108/EC - EN 61326-1
  • Communication Capabilities
  • 3 x 0/4-20 mA; RS485; Ethernet
  • Mounting
  • 28 mm Orbisphere fitting
  • Parameter
  • Oxygen
  • Power Requirements (Voltage)
  • 100 - 230 VAC
  • Range
  • 0 - 2000 ppb dissolved O2 (DO)
  • Relays
  • Measurement board: 3 measurement alarm relays (1A-30 VAC or 0.5A-50 VDC), configurable to send diagnostics information. Main board: 1 system alarm relay (1A-30 VAC or 0.5A-50 VDC).
  • Repeatability
  • ± 0.4 ppb or 1 % whichever is greater
  • Sensors
  • K1200 LDO
  • Storage Conditions
  • -5 °C - 100 °C
  • Warranty
  • 12 months
  • What's included?
  • K1200 Sensor only.Controller 510, sensor cable, flow-chamber or process connection must be ordered separately.
K1200-S00H Orbisphere K1200 LDO Oxygen sensor, 0 - 40 ppm, 28 mm Orbisphere fitting Special offer 
Add to Cart
  • Certifications
  • 2004/108/EC - EN 61326-1
  • Communication Capabilities
  • 3 x 0/4-20 mA; RS485; Ethernet
  • Mounting
  • 28 mm Orbisphere fitting
  • Parameter
  • Oxygen
  • Power Requirements (Voltage)
  • 100 - 230 VAC
  • Range
  • 0 - 40 ppm dissolved O2 (DO)
  • Relays
  • Measurement board: 3 measurement alarm relays (1A-30 VAC or 0.5A-50 VDC), configurable to send diagnostics information. Main board: 1 system alarm relay (1A-30 VAC or 0.5A-50 VDC).
  • Repeatability
  • ± 0.015 ppm or 2 % whichever is greater
  • Sensors
  • K1200 LDO
  • Storage Conditions
  • -5 °C - 100 °C
  • Warranty
  • 12 months
  • What's included?
  • K1200 Sensor only.Controller 510, sensor cable, flow-chamber or process connection must be ordered separately.
K1100-S00H Orbisphere K1100 LDO Oxygen sensor, 0 - 40 ppm, 28 mm Orbisphere fitting Special offer 
Add to Cart
  • Certifications
  • 2004/108/EC - EN 61326-1
  • Communication Capabilities
  • 3 x 0/4-20 mA; RS485; Ethernet
  • Mounting
  • 28 mm Orbisphere fitting
  • Parameter
  • Oxygen
  • Power Requirements (Voltage)
  • 100 - 230 VAC
  • Range
  • 0 - 40 ppm dissolved O2 (DO)
  • Relays
  • Measurement board: 3 measurement alarm relays (1A-30 VAC or 0.5A-50 VDC), configurable to send diagnostics information. Main board: 1 system alarm relay (1A-30 VAC or 0.5A-50 VDC).
  • Repeatability
  • ± 0.015 ppm or 2 % whichever is greater
  • Sensors
  • K1100 LDO
  • Storage Conditions
  • -5 °C - 100 °C
  • Warranty
  • 12 months
  • What's included?
  • K1100 Sensor onlyController, sensor cable, flow-chamber or process connection must be ordered separately
DGK510KK-W1025 Kit: Dual-channel Orbisphere 510 controller, 2x K1100 LDO sensors (0-2000 ppb), 2x 6 mm flow chamber, wall mount Special offer 
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  • Certifications
  • 2004/108/EC - EN 61326-1
  • Communication Capabilities
  • 3 x 0/4-20 mA; RS485; Ethernet
  • Controller
  • Wall
  • Mounting
  • Two 6 mm flow chambers
  • Parameter
  • Oxygen
  • Power Requirements (Voltage)
  • 100 - 230 VAC
  • Range
  • 0 - 2000 ppb dissolved O₂ (DO)
  • Relays
  • Measurement board: 3 measurement alarm relays (1A-30 VAC or 0.5A-50 VDC), configurable to send diagnostics information. Main board: 1 system alarm relay (1A-30 VAC or 0.5A-50 VDC).
  • Repeatability
  • ± 0.4 ppb or 1 % whichever is greater
  • Sensors
  • Two K1100 LDO
  • Storage Conditions
  • -5 °C - 100 °C
  • Warranty
  • 12 months
  • What's included?
  • 1x Orbisphere controller 510KK0/W1C00000, 2x K1100-S00 sensor (low level), 2x 6 mm flow chamber 32001.010, 2x 32510.05 Sensor cable (5 m) to connect M/K-type sensor with Orbisphere 510 instruments
K1100-KTO-P-MET Orbisphere K1100 LDO Sensor Kit, 0-2000 ppb, 410 controller, 6 mm flow chamber, panel mount Special offer 
Add to Cart
  • Certifications
  • 2004/108/EC - EN 61326-1
  • Communication Capabilities
  • 3 x 0/4-20 mA; RS485; Ethernet
  • Controller
  • Panel
  • Mounting
  • 6 mm flow chamber
  • Parameter
  • Oxygen
  • Power Requirements (Voltage)
  • 100 - 230 VAC
  • Range
  • 0 - 2000 ppb dissolved O₂ (DO)
  • Relays
  • Measurement board: 3 measurement alarm relays (1A-30 VAC or 0.5A-50 VDC), configurable to send diagnostics information. Main board: 1 system alarm relay (1A-30 VAC or 0.5A-50 VDC).
  • Repeatability
  • ± 0.4 ppb or 1 % whichever is greater
  • Sensors
  • K1100 LDO
  • Storage Conditions
  • -5 °C - 100 °C
  • Warranty
  • 12 months
  • What's included?
  • Includes 410 panel mount controller, K1100 LDO sensor (low level), 3 m sensor cable, stainless steel flow-chamber with 6 mm fittings
K1100-S00 Orbisphere K1100 Luminescent Dissolved oxygen (LDO) sensor for in-line applications, 0-2000 ppb, 28 mm Orbisphere fitting Special offer 
Add to Cart
  • Certifications
  • 2004/108/EC - EN 61326-1
  • Communication Capabilities
  • 3 x 0/4-20 mA; RS485; Ethernet
  • Mounting
  • 28 mm Orbisphere fitting
  • Parameter
  • Oxygen
  • Power Requirements (Voltage)
  • 100 - 230 VAC
  • Range
  • 0 - 2000 ppb dissolved O2 (DO)
  • Relays
  • Measurement board: 3 measurement alarm relays (1A-30 VAC or 0.5A-50 VDC), configurable to send diagnostics information. Main board: 1 system alarm relay (1A-30 VAC or 0.5A-50 VDC).
  • Repeatability
  • ± 0.4 ppb or 1 % whichever is greater
  • Sensors
  • K1100 LDO
  • Storage Conditions
  • -5 °C - 100 °C
  • Warranty
  • 12 months
  • What's included?
  • K1100 Sensor only Controller, sensor cable, flow chamber or process connection must be ordered separately
HACH7300800 Flow cell for 1” NPT sensor 604 
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HACH9012700 Analog Flow Sensor Input Module for SC200 Universal Controller 809 
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  • Calibration Method
  • ZeroGLI DRY-CAL1-point sample
  • Length
  • 181 mm
  • Range
  • Contacting Conductivity 0 - 2.000 µS/cm
  • What's included?
  • Module, Manual
HACH9328100 Hart Network Communication Module for SC200 Universal Controller 722 
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  • Length
  • 181 mm
  • Warranty
  • 12 months
  • What's included?
  • Module, Manual

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