Custom Sensors & Technology

531 Axminister Drive
Fenton,  MO  63026

United States
  • Booth: 8341

Custom Sensors & Technology has been innovating in process analytics for over 40 years. We provide customers with online analyzers for many applications including: Oil in Water, H2S Monitoring & Removal, BTEX, Fuel Dyes, Turbidity, Water in Fuel, Silica, and many more. We also manufacture a complete line of probes, flow cells, and insertion tools to be used in conjuction with our analyzers. 


  • PX2+ Photometer
    The PX2+ is a highly sensitive, easy to use, and compact instrument capable of making absorbance or fluorescence measurements. It was designed for continuous process monitoring applications, such as Oil in Water, Fuel Dyes, and many more custom solutions....

  • The PX2+ features 3.2” capacitive touch LCD that allows users to calibrate and view data. Process monitoring equipment is a great investment as economic benefits arise from greater process control and less waste. The PX2+ is designed to alert users when properties of their process stream change and no longer fall within acceptable limits. The ability to monitor process conditions in real-time allows users to observe small changes before they become much bigger problems.  

    Core Applications:

    • Oil in Water
    • Fuel Dyes
    • BTEX
    • Wastewater
    • Chemical Manufacturing


    • Wavelength Range: 185-2600nm
    • Precision/Accuracy: 1% of full scale or better
    • Light Source: LED, Flash Lamp
    • Detector: PMT, Si Photodiode, InGaAs Photodiode
    • Display:  3.2″ Capacitive Touch Screen Display
    • Alarms: Contact Closure (60 VDC, 0.75 A max.)
    • Analog Output: 4-20 mA, isolated
    • Analog Loop Resistance: 500 ohms @ 24 VDC
    • Digital Output: USB-B, RS-485 (Modbus)
    • Power Consumption: 8.5 watts (max.)
    • Power Requirements: 24 VDC nominal  (12-48 VDC)
    • Enclosure Material: Aluminum
    • Size: 2.8” H x 4.5” W x 9.5” L
    • Temperature: 5-55C
    • Weight: 3.5 lbs. (1.6kg)
  • Automated Extraction System (AES) - Oil in Water
    The Automated Extraction System (AES) combines the PX2 Photometer with a programmable sampling system capable of performing fully automated liquid-liquid extractions and delivering the extract to an analysis cell....

  • The Automated Extraction System (AES) combines the PX2 Photometer with a programmable sampling system capable of performing fully automated liquid-liquid extractions and delivering the extract to an analysis cell.

    First, the AES retrieves a known volume of sample from a process stream via fast loop and adds a known volume of solvent.  Next, it mixes the sample and solvent phases to create an emulsion, which allows the solute to transfer to the solvent phase.  Finally, the AES instrument determines the concentration of the solute by means a fluorescence measurement made in the analysis chamber.

    The AES contains all of the hardware to perform the mechanical functions of the extraction, and is designed to be mounted near the process line at which the measurement will be performed.

    The Auto-Tune feature takes the guesswork out of selecting the optimal measurement settings, and the Auto-Calibrate function only requires the user to prepare one standard.


      • Method: Fluorescence via liquid-liquid extraction
      • Range: 0-100 ppm to 0-45,000 ppm (configurable)
      • Repeatability: ± 1% of full scale or better
      • Output: on-board display, isolated 4-20mA, RS-485 (Modbus)
      • Alarm: N.O. relay 60 VDC/0.75A max
      Operating Conditions
      • Ambient Temperature: 41-122F (5-50C)
      • Process Temperature: 41-122F (5-50C)
      • Process Pressure: 100 PSI max
      Utility Requirements
      • Power Required: 88-132 VAC/176-264 VAC, 50/60Hz
      • Power Consumption: 120W max
      • Instrument Air: 100-110 PSI; 1 cfm max
      • Enclosure: 304 Stainless Steel
      • Dimensions: 20″ x 10″ x 50″ (50.8 cm x 25.4 cm x 127 cm)
      • Weight: 180 lbs. (81.6 kg)
  • RS-1 Colorimetric Analyzer
    RS1 is designed to perform fully automated colorimetric measurements and deliver the product of the chemical reaction to an analysis cell. An absorbance measurement is performed to determine the concentration of the solution. Applications: Silica...

  • The RS1 Colorimetric Analyzer is designed to automate time-consuming ASTM laboratory based tests in a process setting while producing accurate concentration measurements for many water quality applications. Designed for ease-of-use, simply connect the sample inlet and outlet, reagent, and waste lines and power up the analyzer. Information and customization options are easily accessible via the 7” intuitive touch screen display and user-friendly software. Users will benefit from a higher volume of testing and faster turnaround time while increasing precision, reproducibility, and throughput. The RS1 also reduces human error and enables laboratory personnel to be more productive by focusing less on repetitive tasks. Compared to traditional manual sampling, the RS1 provides operators with a real-time indication of actual process conditions.

    ◊ The RS1 performs fully automated colorimetric measurements in a process setting utilizing up to three reagents.
    ◊ Programmable automatic calibration with self referencing feature.
    ◊ Programmable cleaning cycle and long life LED minimizes required maintenance.
    ◊ 7” intuitive touch screen display with easy-to-use software allows users to calibrate and view data.
    ◊ Dual compartment enclosure ensures complete separation between electronics, sample, and reagents.
    ◊ Standard data outputs include MODBUS, 4-20mA, and USB to CST Software.


    • Silica in Water
Please contact for questions.
For technical assistance please contact: support.