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Pyxis SP-400 PTSA & Conductivity Combo Handheld Meter

USA Toll Free: 1-800-730-0302 Tel: 416-240-1920 -

Simple to operate

One-handed operation. No vial or cuvette needed. One press to calibrate Pyxis ST-500 inline fluorometer via built-in WiFi.

Tolerance to interference

Auto-compensation for sample color and turbidity. Holds accuracy for a long period of time. No need for frequent calibration.

Durable and affordable

Fully dustproof and waterproof. Rugged structure to survive in a tough industrial environment. Affordable: start your fluorescent traced program today.

JUST ONE PRESS To Start Your Fluoroscence Traced Programs

  • Simple to operate PTSA handheld meter
  • Tolerance to interference
  • Durable and affordable

Common Specifications

Items Specifications
Battery 9V alkaline battery
Typical Battery Life 3,200 readings(480mAh battery)
Display TFT-LCD, visible in direct sunlight
Dimensions (L x W x H) 160 x 74 x 33 (mm)
Weight 295g (without battery)
Temperature Range 40-106℉(4-41℃)
Humidity 85% at 106℉(41℃)
Envionmental IP67, dustproof and waterproof
Regulation CE

Intuitive Operation

Just fill the built-in sample cell with water and press OK. The intuitive graphical display lets you easily conduct calibration when needed.

The displays below show simple operation flow for PTSA Standalone Calibration (2 Point with Zero):

PTSA Determination with Immunity to Color and Turbidity

Insufficient attention has been paid to color and turbidity interference to the measurement accuracy of PTSA fluorescence. Pyxis proprietary technology provides robust measurement and achieves maximum rejection of interference by utilizing a state-of-the-art optical design and advanced compensation algorithm.

SP-350 PTSA reading compensates for sample turbidity up to 40 NTU and sample color equivalent to 5 ppm total iron. If sample turbidity is too high or the sample color is too intensive, SP-350 displays a warning. When this happens, filter water sample before testing.

SP-350 Specifications

P/N Target fluorophore and range Applications
SP-350 50206 PTSA(0-300 ppb) Cooling tower fluorescence tracing
SP-380 50208 PTSA(0-300 ppb) Fluorescein(0-1,000.0 ppb) Cooling tower and boiler fluorescence tracing
SP-395 50209 Halogenated azoles(0-5 ppm),NDSA(0-100 ppb) Cooling tower fluorescence tracing
SP-400 50201 PTSA(0-300 ppb),Conductivity(0-15000 S/cm) Cooling tower fluorescence tracing

*Note: Specifications are subject to change without notice.Contact Pyxis product support ( for updates.


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Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


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