ST-500 / 50661PRODUCT IMAGECooling & process water
ST-500Inline PTSA sensor
ST-500 / SKU 50661Continuous optical tracer monitoring for suitable cooling-water applications.
MeasurementPTSAOutput0–200 ppb · isolated 4–20 mA and RS-485 Modbus
PYXIS INSTRUMENTS / MALAYSIA
Pyxis instruments for
water and cooling systems.
HX Solutions Technology is a Malaysian reseller of Pyxis instruments. Compare specifications and application fit, then tell us where the instrument goes — the process, the measurement point and your output or controller requirement. We confirm the right variant, accessories and delivery details, then quote for your project.
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ST-500 / 50661PRODUCT IMAGE
ST-587 / 50906SERIES REFERENCE IMAGECooling & process water
ST-587Inline PTSA + turbidity sensor
ST-587 / SKU 50906Inline PTSA and turbidity measurement for cooling-water applications where colour and suspended solids can influence tracer readings.
MeasurementPTSA + turbidityOutputs2 × isolated 4–20 mA · isolated RS-485 Modbus · 8-pin
ST-590 / 50690SERIES REFERENCE IMAGECooling & process water
ST-590Inline fluorescent-polymer sensor
ST-590 / SKU 50690Inline fluorescent-polymer measurement with colour and turbidity compensation for treatment monitoring.
MeasurementFluorescent polymerRange0–20 ppm fluorescent polymer
SP-800 / 50610PRODUCT IMAGEPortable field verification
SP-800Portable multiparameter colorimeter
SP-800 / SKU 50610Portable multiparameter colorimeter and turbidimeter for water analysis across municipal, environmental and industrial applications.
Optics7 colorimetric wavelengths · white and infrared turbidity LEDMethodsOver 65 built-in reagent-based methods; user-defined methods supported
SP-910 / 50603PRODUCT IMAGEPortable field verification
SP-910Portable fluorometer, colorimeter and turbidimeter
SP-910 / SKU 50603Portable multiparameter instrument combining fluorometer, colorimeter and turbidity measurement.
FluorescenceDirect-read PTSA 0–300 ppb · fluorescein 0–600 ppbOptics7 colorimetric wavelengths · white and infrared turbidity LED
HM-900 / 52201PRODUCT IMAGEPortable field verification
HM-900Portable oil-in-water analyzer
HM-900 / SKU 52201Portable fluorometer for measuring multiple oil types in water using direct-read or extraction workflows.
MeasurementOil-in-water by UV fluorescenceRange0.1–1,000 ppm with automatic channel switching
EM-400 / 50508PRODUCT IMAGEPortable field verification
EM-400Algae handheld fluorometer
EM-400 / SKU 50508Reagent-less handheld fluorometer for in-vivo chlorophyll-a measurement in live algae cells, suited to cooling-water and surface-water monitoring.
Measurement0.3–50 ppb in-vivo chlorophyll-aDetection and accuracy0.1 ppb detection limit · ±1% or 0.1 ppb accuracy
EM-500 / 50501SERIES REFERENCE IMAGECore water quality
EM-500Inline chlorophyll-a sensor
EM-500 / SKU 50501Measures in-vivo chlorophyll-a from live algae cells in water for continuous algae-growth monitoring. Colour and turbidity compensation helps maintain readings in industrial and process applications.
MeasurementIn-vivo chlorophyll-a · 0–50 ppbPrecision±0.2 ppb
EM-500SS / 56042SERIES REFERENCE IMAGECore water quality
EM-500SSInline chlorophyll-a sensor
EM-500SS / SKU 56042Measures in-vivo chlorophyll-a from live algae cells in water using the stainless-steel EM-500 variant. It is suited to continuous algae-growth monitoring where a more robust sensor body is required.
MeasurementIn-vivo chlorophyll-a · 0–50 ppbSensor body304 stainless steel
EZ-100 / 63277PRODUCT IMAGEPortable field verification
EZ-100Portable pH meter
EZ-100 / SKU 63277Portable meter for measuring aqueous-solution pH and electrode potential in laboratory or field work.
MeasurementpH 0–14 · ±0.01 pH; electrode potential −1999–1999 mV · ±1 mVTemperature−5–110 °C (23–230 °F)
EZ-101 / 67840PRODUCT IMAGEPortable field verification
EZ-101Benchtop pH meter
EZ-101 / SKU 67840Benchtop meter for measuring aqueous-solution pH and electrode potential in laboratory and field workflows.
MeasurementpH 0–14 · ±0.01 pH; electrode potential −1999–1999 mV · ±1 mVTemperature−5–110 °C (23–230 °F)
SP-200 / 50802PRODUCT IMAGEDisinfection verification
SP-200Pocket oxidizing-biocide colorimeter
SP-200 / SKU 50802All-in-one pocket colorimeter for conventional oxidizing biocides and disinfectants in municipal, domestic and industrial water work, with direct-read chlorine dioxide and bleach concentration methods.
MeasurementColorimetric oxidizing biocides, disinfectants and ammonia · direct-read chlorine dioxide and bleach concentrationColorimetric wavelengths365 / 420 / 470 / 525 / 568 / 624 nm
SP-208 / 63068PRODUCT IMAGEDisinfection verification
SP-208Pocket free and total chlorine colorimeter
SP-208 / SKU 63068Pocket colorimeter for rapid DPD field measurement of free and total chlorine across low and high concentration ranges.
MeasurementFree or total chlorine · 0.02–2.2 ppm low range · 0.1–10 ppm high rangeMethodDPD colorimetric testing
SP-210 / 50801PRODUCT IMAGEDisinfection verification
SP-210Pocket bleach concentration meter
SP-210 / SKU 50801Direct-pour pocket analyzer for real-time bleach concentration as mass/mass in industrial, municipal and process-water work, with integrated temperature compensation for diluted and concentrated solutions.
Measurement0.01–16% mass/mass bleach concentrationAccuracy±2% of reading value; ±0.1% of unit range
SP-350 / 50206PRODUCT IMAGEPortable field verification
SP-350PTSA handheld fluorometer
SP-350 / SKU 50206Direct-pour handheld measurement of PTSA from 0–300 ppb with color and turbidity compensation. It fits rapid checks of industrial cooling, boiler and process water.
MeasurementPTSA · 0–300 ppbSample handlingDirect-pour sample cell; no sample cuvette required
SP-350P / 50228PRODUCT IMAGEPortable field verification
SP-350PFluorescent polymer handheld fluorometer
SP-350P / SKU 50228Direct measurement of fluorescent tagged polymer from 0.1–20.0 ppm with color and turbidity compensation. It is suited to tracer verification in cooling and process water.
MeasurementFluorescent (tagged) polymer · 0.1–20.0 ppmAccuracy±1% or ±1.0 ppm polymer
SP-350RO / 61389PRODUCT IMAGEPortable field verification
SP-350ROReverse-osmosis PTSA handheld fluorometer
SP-350RO / SKU 61389Direct-pour PTSA measurement from 0–40 ppb with compensation for color and turbidity. Its lower-range focus fits reverse-osmosis feed-water antiscalant checks.
MeasurementPTSA · 0–40 ppbApplicationReverse-osmosis feed-water antiscalant measurement
SP-380 / 50208PRODUCT IMAGEPortable field verification
SP-380PTSA and fluorescein handheld fluorometer
SP-380 / SKU 50208Dual-channel direct-pour measurement of PTSA and fluorescein with color and turbidity compensation. It fits tracer checks in industrial cooling, boiler and process water.
MeasurementPTSA · 0–300 ppb; fluorescein · 0–600 ppbSample handlingDirect-pour sample cell; no sample cuvette required
SP-380P / 50402PRODUCT IMAGEPortable field verification
SP-380PPTSA and fluorescent polymer handheld fluorometer
SP-380P / SKU 50402Dual-channel measurement of PTSA and fluorescent tagged polymer with color and turbidity compensation. It provides direct tracer verification for cooling and process water programs.
MeasurementPTSA · 0.0–300.0 ppb; fluorescent polymer · 0.0–20.0 ppmAccuracy±1% or ±1.0 ppb PTSA; ±1% or ±1.0 ppm polymer
SP-395N / 50226PRODUCT IMAGEPortable field verification
SP-395NNDSA handheld fluorometer
SP-395N / SKU 50226UV-fluorescence handheld measurement of NDSA from 0–100 ppb for rapid validation. It is intended for research and development and requires application checks for organic background and treatment interferences.
MeasurementNDSA · 0–100 ppbMethodUV fluorescence
SP-395T / 50209PRODUCT IMAGEPortable field verification
SP-395TTolytriazole handheld meter
SP-395T / SKU 50209UV-absorbance handheld measurement of TolyTriazole (TTA) from 0.1–10.0 ppm without reagents, vials or cuvettes. It fits rapid azole verification in treated water systems.
MeasurementTolytriazole (TTA) · 0.1–10.0 ppmAccuracy±0.1 ppm TTA
SP-400 / 50221PRODUCT IMAGEPortable field verification
SP-400PTSA and conductivity handheld fluorometer
SP-400 / SKU 50221Dual-channel direct-pour measurement of PTSA and conductivity with color and turbidity compensation. It fits industrial cooling, boiler and process-water verification.
MeasurementPTSA · 0–300 ppb; conductivity · 0–15,000 µS/cmSample handlingDirect-pour sample cell; no sample cuvette required
SP-505 / 50355PRODUCT IMAGEPortable field verification
SP-505Portable water multimeter
SP-505 / SKU 50355Portable measurement of pH, conductivity, turbidity, ORP, temperature and free/total DPD chlorine. Its rugged, one-handed format fits industrial, environmental, commercial and municipal water checks.
MeasurementpH · conductivity · turbidity · ORP · temperature · free and total DPD chlorineTurbidity0–100 NTU · ±0.1 NTU
SP-600 / 50353PRODUCT IMAGEPortable field verification
SP-600Portable water multimeter and colorimeter
SP-600 / SKU 50353Portable measurement of conductivity, TDS, resistivity, pH, ORP, temperature and free/total DPD chlorine. It is suited to industrial, process, municipal, wastewater, domestic, environmental and brackish-water checks.
MeasurementConductivity · TDS · resistivity · pH · ORP · temperature · free and total DPD chlorineResistivity and conductivityResistivity 10–30 MΩ · ±1%; conductivity 1–200,000 µS/cm with ATC · ±1% or ±0.2 µS/cm precision
SP-710 / 50352PRODUCT IMAGEPortable field verification
SP-710Portable cooling-water multimeter
SP-710 / SKU 50352Portable simultaneous measurement of pH, conductivity, PTSA, temperature, ORP and free/total TMB chlorine. It fits cooling-tower and process-water verification where tracer and chlorine checks are needed together.
MeasurementpH · conductivity · PTSA · temperature · ORP · free and total TMB chlorinePTSA0–300 ppb · ±1 ppb or 1% precision
SP-710B / 50316PRODUCT IMAGEPortable field verification
SP-710BPortable boiler-water multimeter
SP-710B / SKU 50316Portable simultaneous measurement of pH, conductivity, PTSA, temperature, ORP and fluorescein. It is designed for boiler-water and cooling-tower checks where fluorescent tracer verification is required.
MeasurementpH · conductivity · PTSA · temperature · ORP · fluoresceinPTSA0–300 ppb · ±1 ppb or 1% precision
ST-500RO / 50669PRODUCT IMAGECooling & process water
ST-500ROInline PTSA sensor
ST-500RO / SKU 50669Measures PTSA at a concentrated range for reverse-osmosis and desalination systems. Optical compensation for colour and turbidity supports treatment monitoring in demanding water streams.
MeasurementPTSA · 0–40 ppbAccuracy±0.2 ppb
ST-500SS / 50700PRODUCT IMAGECooling & process water
ST-500SSInline PTSA sensor
ST-500SS / SKU 50700Measures PTSA continuously at an expanded range for high-pressure cooling-water applications. Its stainless-steel body and optical colour/turbidity compensation support reliable treatment monitoring.
MeasurementPTSA · 0–300 ppb maximum rangeAccuracy±1 ppb
ST-500W / 58802PRODUCT IMAGECooling & process water
ST-500WInline PTSA sensor
ST-500W / SKU 58802Measures PTSA for cooling and process-water treatment while compensating for colour and turbidity. The stainless-steel sensor is designed to fit WALCHEM and other industry-standard fluorometer tee assemblies.
MeasurementPTSA · 0–200 ppb output scale · 0–300 ppb maximum configurable rangeAccuracy±1 ppb
ST-525 / 50665PRODUCT IMAGECooling & process water
ST-525Inline fluorescein sensor
ST-525 / SKU 50665Measures fluorescein directly for industrial boiler and process-water treatment. Cleanliness diagnostics and configurable output span support routine monitoring and control.
MeasurementFluorescein · 0–60 ppbResolution±0.2 ppb
ST-601 / 50231SERIES REFERENCE IMAGECore water quality
ST-601Inline chlorine dioxide sensor
ST-601 / SKU 50231Measures chlorine dioxide concentration in generator solution using direct optical absorbance with temperature compensation. It fits high-flow tee or low-flow tubing installations without dilution or reagents.
MeasurementChlorine dioxide · 0.0–0.35% mass/massDetection limit0.01%
ST-604 / 50233SERIES REFERENCE IMAGECore water quality
ST-604Inline chlorine sensor
ST-604 / SKU 50233Measures chlorine concentration in electrolysis or bleach streams as a percentage by mass. Direct optical measurement and temperature compensation support continuous disinfectant monitoring.
MeasurementChlorine · 0.0–2.00% mass/massDetection limit0.01%
ST-605 / 54148SERIES REFERENCE IMAGECore water quality
ST-605Inline low-range chlorine dioxide sensor
ST-605 / SKU 54148Measures low-range chlorine dioxide in clean water from 0 to 100 ppm. Direct optical measurement with temperature compensation provides continuous disinfectant verification without dilution or reagents.
MeasurementChlorine dioxide · 0.0–100 ppmDetection limit0.5 ppm
ST-606 / 59433SERIES REFERENCE IMAGECore water quality
ST-606Inline acidified sodium chlorite sensor
ST-606 / SKU 59433Measures acidified sodium chlorite concentration in clean water from 0 to 1,200 ppm. Direct optical measurement and temperature compensation support continuous disinfectant process monitoring.
MeasurementAcidified sodium chlorite · 0.0–1,200 ppmDetection limit2.0 ppm
ST-607 / 50670SERIES REFERENCE IMAGECore water quality
ST-607Inline mid-range chlorine sensor
ST-607 / SKU 50670Measures chlorine concentration in clean water from 0 to 400 ppm. Direct optical measurement with temperature compensation supports continuous residual-disinfectant verification.
MeasurementChlorine · 0–400 ppmDetection limit1.0 ppm
ST-710 / 53001SERIES REFERENCE IMAGECore water quality
ST-710Inline pH sensor
ST-710 / SKU 53001Continuous inline pH measurement for process, industrial, wastewater and cooling-water applications. The sensor combines a flat pH sensing element with embedded transmitter outputs for direct controller or PLC connection.
MeasurementpH 0–14 with ATC · ±0.01 pH unit precisionResponse time95% within 5 seconds
ST-711 / 53002SERIES REFERENCE IMAGECore water quality
ST-711Inline ORP sensor
ST-711 / SKU 53002Continuous inline oxidation-reduction potential measurement for process, industrial, wastewater and cooling-water applications. Its embedded transmitter supports direct connection to a controller, PLC or DCS.
MeasurementORP ±1,500 mV range · ±1.0 mV precisionResponse time95% within 5 seconds
ST-712 / 53003SERIES REFERENCE IMAGECore water quality
ST-712Inline pH + ORP sensor
ST-712 / SKU 53003Combined inline pH and oxidation-reduction potential measurement for process, industrial, wastewater and cooling-water applications. Dual measurement signals are delivered through the embedded transmitter for direct control-system integration.
MeasurementpH 0–14 with ATC · ±0.01 pH unit precision; ORP ±1,500 mV · ±1.0 mV precisionResponse time95% within 5 seconds
ST-720 / 53101PRODUCT IMAGECore water quality
ST-720Inline conductivity + temperature sensor
ST-720 / SKU 53101High-range inline conductivity and temperature measurement for industrial, process, surface and wastewater applications. The embedded transmitter provides conductivity and temperature signals for direct controller or PLC integration.
Conductivity1–100,000 µS/cm · ±10 µS/cm or 1.5%Temperature0–100 °C (32–212 °F) · ±0.2%
ST-723 / 53106PRODUCT IMAGECore water quality
ST-723High-temperature inline conductivity sensor
ST-723 / SKU 53106Inline conductivity and temperature measurement for boiler feedwater and other high-temperature, high-pressure process samples. Its stainless-steel and PEEK construction is designed for elevated operating conditions.
Conductivity0–20,000 µS/cmConductivity precision±10 µS/cm or ±3.5% of full scale, whichever is greater
ST-724 / 10009SERIES REFERENCE IMAGECore water quality
ST-724Ultra-low conductivity sensor
ST-724 / SKU 10009Ultra-low inline conductivity measurement for pure, ultrapure and deionized water systems. The stainless-steel sensor fits applications such as boiler feedwater, condensate, RO/EDI process water and data-centre cooling.
Conductivity0.02–1,000 µS/cmTemperatureBuilt-in temperature sensor · 32–212 °F (0–100 °C)
ST-725 / 53108SERIES REFERENCE IMAGECore water quality
ST-725Ultra-low conductivity sensor
ST-725 / SKU 53108Ultra-low inline conductivity measurement for pure, ultrapure and deionized water systems. Its stainless-steel construction supports low-conductivity monitoring in boiler, RO/EDI, ion-exchange and other process applications.
Conductivity0.02–200 µS/cmTemperatureBuilt-in temperature sensor · 32–212 °F (0–100 °C)
ST-726 / 53114SERIES REFERENCE IMAGECore water quality
ST-726Inline conductivity + temperature sensor
ST-726 / SKU 53114Extended-range inline conductivity and temperature measurement for industrial, process, surface and wastewater applications. Its embedded transmitter sends conductivity and temperature data directly to a controller or PLC.
Conductivity10–300,000 µS/cm · ±10 µS/cm or 1.5%Temperature0–100 °C (32–212 °F) · ±0.2%
ST-728 / 53117SERIES REFERENCE IMAGECore water quality
ST-728Ultra-low conductivity sensor
ST-728 / SKU 53117Ultra-low inline conductivity measurement for pure, ultrapure and deionized water systems. The low-detection design fits applications including boiler condensate, RO/EDI process water, semiconductor cleaning and desalination.
Conductivity0.02–10.0 µS/cm · ±0.1 µS/cm or 1% of valueTemperature32–212 °F (0–100 °C) · ±1% of value
ST-730 / 53201SERIES REFERENCE IMAGECore water quality
ST-730Inline turbidity sensor
ST-730 / SKU 53201Measures turbidity from 0 to 100 NTU in industrial, cooling, process and environmental water. The compact inline sensor fits continuous monitoring where fouling and bubbles can challenge optical readings.
Measurement0–100 NTU turbidityAccuracy±2% of reading
ST-730B / 53202SERIES REFERENCE IMAGECore water quality
ST-730BInline turbidity sensor
ST-730B / SKU 53202Measures turbidity from 0 to 1,000 NTU for industrial, cooling, process and environmental water. Its higher-range optical configuration supports monitoring where particulate loading is significant.
Measurement0–1,000 NTU turbidityResolution1 NTU
ST-731 / 53505SERIES REFERENCE IMAGECore water quality
ST-731Low-range inline turbidity sensor
ST-731 / SKU 53505Measures low-range turbidity from 0 to 10 NTU for continuous water-quality monitoring. It is suited to inline process and environmental applications that need fine resolution at low turbidity.
Measurement0–10 NTU turbidityResolution0.05 NTU
ST-735 / 53204SERIES REFERENCE IMAGECore water quality
ST-735High-range inline turbidity sensor
ST-735 / SKU 53204Measures turbidity from 0 to 10,000 NTU for heavily loaded industrial and environmental water. The inline format supports continuous monitoring in challenging process streams.
Measurement0–10,000 NTU turbidityResolution10 NTU
ST-765P / TBCSERIES REFERENCE IMAGEDisinfection verification
ST-765PCPVC oxidizer and pH sensor
ST-765P / SKU TBCMeasures an oxidizer together with pH and temperature in clean-water applications. The CPVC series fits potable, secondary-supply, domestic and other clean-water systems using a flow reservoir.
MeasurementFree chlorine 0.00–5.00ppm; chlorine dioxide 0.00–5.00ppm; free chlorine plus sulfite 0–5ppm plus 0–100ppm; or ozone 0.00–2.00ppm, depending on variantAccuracy±0.01mg/L or 1% of value for oxidizer, with pH compensation up to pH 9.0
ST-765SS / TBCSERIES REFERENCE IMAGEDisinfection verification
ST-765SSStainless steel oxidizer and pH sensor
ST-765SS / SKU TBCMeasures an oxidizer together with pH and temperature in clean-water applications. The stainless steel series is intended for potable, secondary-supply, domestic and other clean-water systems.
MeasurementFree chlorine or chlorine dioxide, each 0.00–5.00ppm, depending on variantAccuracy±0.01mg/L or 1% of value for oxidizer, with pH compensation up to pH 9.0
ST-772 / 53703PRODUCT IMAGECore water quality
ST-772Submersible dissolved oxygen sensor
ST-772 / SKU 53703Measures dissolved oxygen from 0.004 to 20mg/L for wastewater, aeration, aquaculture and process-water monitoring. The stainless steel sensor is configured for submerged installation with automatic temperature and pressure compensation.
Measurement0.004–20mg/L dissolved oxygen; 0–200% saturation; or 0–500mbar PO₂Accuracy±0.1mg/L or ±1%, whichever is greater
ST-772T / 53719SERIES REFERENCE IMAGECore water quality
ST-772TInline dissolved oxygen sensor
ST-772T / SKU 53719Measures dissolved oxygen from 0.004 to 20mg/L for continuous process, wastewater and water-treatment monitoring. The stainless steel variant is configured for bypass or inline pipe-tee installation.
Measurement0.004–20mg/L dissolved oxygen; 0–200% saturation; or 0–500mbar PO₂Accuracy±0.1mg/L or ±1%, whichever is greater
ST-773 / 53709PRODUCT IMAGECore water quality
ST-773CPVC dissolved oxygen sensor
ST-773 / SKU 53709Measures dissolved oxygen from 0.004 to 20mg/L for wastewater, process-water, filtration and aquaculture applications. Its CPVC body supports submerged or inline installation with built-in temperature compensation.
Measurement0.004–20mg/L dissolved oxygen or 0–200% saturationAccuracy±0.3mg/L or ±3%, whichever is greater
ST-774 / 53715PRODUCT IMAGECore water quality
ST-774Ultra-low dissolved oxygen sensor
ST-774 / SKU 53715Measures ultra-low dissolved oxygen from 0.0 to 2,000µg/L (ppb) in boiler feedwater, condensate, closed-loop and ultrapure-water systems. The stainless steel sensor uses a flow connection for controlled sample measurement.
Measurement0.0–2,000µg/L (ppb) dissolved oxygenDetection limit0.4µg/L (ppb)
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