Pyxis Cooling Tower Handheld Meters

Pyxis cooling tower handheld meters, SP-700

Water Multimeterpyxis cooling tower handheld meters

Meter Brochure    Meter Manual

  • pH + ORP module
  • Bluetooth connectivity
  • PTSA and conductivity cell
  • Large color screen, easy operation

The Pyxis SP-700 handheld multimeter measures six key water treatment parameters simultaneously: pH, conductivity, PTSA, fluorescein, ORP, and temperature. Featuring simple, one-handed operation, the multimeter leverages Pyxis proprietary technology combining electrochemical and optical measurements in a cuvette-less platform.

With the SP-700, you can view results in under a minute for all key parameters for a typical water treatment application such as cooling tower analysis. The multimeter logs a complete measurement history, which you can transfer via Bluetooth to your smart phone or PC for statistical analysis.

Custom product names and tracer/product ratios can be configured via Bluetooth-enabled devices.

For highest accuracy, the PTSA measurement uses our proprietary signal processing algorithms to compensate for sample color and turbidity conditions, which would otherwise cause erroneous readings.

Typical Applications

Traced water treatment for industrial / commercial cooling towers and boilers.

SP-700 Features

  • Breakthrough technology combines PTSA / fluorescein with conductivity / pH and ORP in a single, rugged one-handed meter.
  • Proprietary pH / ORP module design with extra-large junction capacity provides increased service life and can be replaced without opening the meter enclosure.
  • Intelligent sensor aging and pollution detection capability provides self-diagnosis during calibration.
  • On-board storage lets you record up to 8 Gb of historical data with time stamp and options to set up sample location information.
  • Long battery life enables 10,000+ readings.
Item Specification
Analysis PTSA/Fluorescein 0~300 ppb,±1 ppb or 1% precision 0~60.0 ppb,±0.6 ppb
Conductivity 1~15,000 uS/cm with ATC ±1% or ±1 uS/cm precision
pH 0~14 with ATC,±0.01 pH unit precision
ORP ±1500mV,±1mV precision
Temperature 0~70℃(32~160℉) ±0.1℃(±0.18℉)
Storage temperature -20℃~60℃(-4~140℉)
Operational temperature 0℃~40℃(32~104℉)
Sensor module pH/ORP,replaceable
Typical sensor life pH/ORP-2 years PTSA/Conductivity-5 years
Protection grade IP67, dustproof and waterproof
Regulation CE marked
Display Color LCD,visible under direct sunlight
Power supply 4 AA alkaline batteries
Typical battery life 10,000 readings
Dimensions (L x W x H) 180 x 80 x 38.5 (mm)
Weight ~500g (without batteries)




pyxsis portable water analyzer

SP-910 Brochure     SP-910 Manual

Pyxsis Portable Water Analyzer Features

  • PTSA and fluorescein

    Measure PTSA and fluorescein in the same meter for your traced programs in cooling and boiler applications.

  • Calibrate ST-500 Directly

    Calibrate a nearby ST-500 via built-in Bluetooth after measuring sample concentration. No laptop or other tool is needed.

  • User-defined Programs

    User-defined programs are supported with non-linear calibration curves. Choose from over 60 programs, including reagent-less nitrite and chlorine dioxide measurement.

  • Battery Life Doubled

    Battery life is six months or more, even with higher resolution LCD readable in direct sunlight.

  • More Upgrades

    Turbidity range is extended to 0-100 and 0-1000 NTU with auto-ranging. 16mm tube adapter is available for programs that require digestion. The SP-910 talks to your smart phone for firmware upgrades and data log transfer.

PTSA Determination with Immunity to Color and Turbidity Interference

Maximum rejection to sample color and turbidity interference by state-of-the-art optical design and proprietary compensation algorithm.

54 Methods Supported…with more on the way

Methods are continually being added. Contact us for an updated list.

Parameter Description,Corresponding Hach® PRMP Number Range (ppm)
NO₂ Direct nitrate,no reagent needed,Pyxis method 100 1000
Cl Turbidimetric method for chloride ion,Low Range,Pyxis method 4 40
Cl Turbidimetric method for chloride ion,Middle Range,Pyxis method 40 400
Mg2+ Magnesium,EBT method,Middle Range,Pyxis method 10 100
Mg2+ Magnesium,EBT method,High Range,Pyxis method 100 400
Polymer Turbidimetric method for anionic polymers,Pyxis method 0.2 13.0
ClO₂ Direct reading automatic range selection,Pyxis method 0.2 3000
Bleach Direct Method measuring sodium hypochlorite concentration,Pyxis method 1% 12%
Chlorine Chlorine,Free,DPD,PRMP 9 0.02 2.2
Chlorine Chlorine,Total,DPD,PRMP 9 0.02 2.2
Chlorine High Range DPD Chlorine,No sample change needed.PRMP 12 0.1 6.0
Cu Copper,Bicinchoninate Method,PRMP 20 0.02 5.0
Cu Porphyrin Method for Copper,PRMP 22 0.006 0.2
DEHA DEHA,Iron Reduction Method for Oxygen Scavengers,PRMP 25 0.009 0.5
Ca2+ Calcium:Calmagite Colorimetric Method,PRMP 29 0.08 4.0
Mg2+ Magnesium:Calmagite Colorimetric Method,PRMP 30 0.13 4.0
Fe Iron,1,10 phenanthroline Method,PRMP 33 0.03 3.0
Fe Iron,FreeoZine Method,PRMP 37 0.011 1.3
Fe Iron,TPTZ Method,PRMP 39 0.04 1.8
Fe Iron,for cooling water with molybdenum-based treatment,PRMP 38 0.03 1.8
MoO42- Molybdenum,High Range,Mercaptoacetic Acid Method,PRMP 44 0.2 40.0
MoO42- Molybdenum,Low Range,Ternary Complex,PRMP 47 0.07 3.0
NO2 Nitrite,High Range,Ferrous Sulfate,PRMP 59 2.0 150.0
NO2 Nitrite,Low Range,Diazotization,PRMP 60 0.005 0.3
OPO4 Phosphorus,Reactive,Molybdovanadate,PRMP 77 0.2 45.0
OPO4 Phosphorus,Reactive,Orthophosphate Ascorbic Acid,PRMP 79 0.05 2.5
OPO4 Phosphorus,Reactive,Amino Acid,PRMP 85 0.2 30.0
Phosphonate Phosphonates,Persulfate UV Oxidation,PRMP 80 0.05 2.5
ClO2 Chlorine Dioxid,DPD,PRMP 112 0.04 5.0
ClO2 Chlorine Dioxid,Direct Reading,PRMP 7 7.3 50.0
SiO2 Silica,High Range,Silicomolybdate,PRMP 89 1.0 75.0
SiO2 Silica,Low Range,Heteropoly Blue,PRMP 90 0.02 1.6
Azole Benzotriazole,UV Photolysis Method,PRMP 3 0.7 16.0
SO42- Turbidimetric method for Sulfate.PRMP 91 4.9 70.0
Cr(VI) Hexavalent chromium,1,5-Diphenylcarbohydrzaide Method,PRMP 13 0.01 0.6
Cr Chromium total Alkaline Hypobromite Oxidation Method, PRMP 15 0.01 0.6
NH3-N Salicylate Method, PRMP 64 0.02 0.5
Mn2+ Low Range Manganese PAN Method, PRMP 43 0.02 0.7
Mn2+ High Range Manganese,Periodate Oxidation Method, PRMP 41 0.2 20.0
NH2Cl Indophenol Method for MonoChloramine,PRMP 110 0.1 3.0
Al Aluminon Method for Aluminum,PRMP 1 0.02 0.8
F SPANDS 2 Method for Fluoride,PRMP 27 0.05 2.0
Zn Zincon Method for Zinc,PRMP 97 0.02 3.0
S2- Methylene Blue Method for Sulfide,PRMP 93 0.01 0.7
CN Pyridine-Pyrazalone Method for Cyanide,PRMP 23 0.008 0.2
N2H4 P-Dimethylaminobenzaldehyde Method for Hydrazine, PRMP 31 0.016 0.5
NO3-N Middle range nitrate, PRMP 54 0.2 5.0
NO3-N High range nitrate, PRMP 51 0.8 30.0
Ni PAN Method for Nickel,PRMP 48 0.013 1.0
(HOCN)3 Turbidimetric Method,PRMP 24 7 5
pH Phenol red method pH, PRMP 75 6.5 8.5

SP-910 Specificationspyxsis portable water analyzer

Range 0-300 ppb PTSA, 0-60 ppb fluorescein
Colorimeter Wavelength 420,455,525,560,570 and 610 nm
Turbidity Excitation Wavelength White and IR LED
Fluorescence Excitation Wavelength 365/470 nm LED
Fluorescence Emission Wavelength 410/525 nm LED
Wavelength Accuracy ±1 nm
Absorbance Reproducibility 0.005 au in the range of 0 to 1.0 au (3 sigma)
Absorbance Linearity range 0 to 1.0 au
Fluorescence Reproducibility 0.3 ppb PTSA/0.03 ppb fluorescein (3 sigma)
Fluorescence Detection Limit 1 ppb PTSA/0.1 ppb fluorescein
Turbidity Range 0-100/0-500 NTU Auto Range
Turbidity Detection Limit 1 NTU
Battery 4 AA alkaline
Typical Battery Life 6 months
Display LCD display, visible under direct sunlight
Dimensions (L x W x H) 265 x 88 x 69 (mm)
Weight 600g (without battery)
Temperature Range 40 to 106℉(4 to 41℃)
Humidity 85% at 106℉(41℃)
Envionmental IP67, dustproof and waterproof