MicroTOL Online Turbidity Meter

Online turbidimeter for real-time analysis of water turbidity

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MicroTol Water Turbidity Meter


  • Quick and easy calibration.
  • Verification in seconds, a complete primary calibration in less than 5 minutes.
  • Low volume sample chamber (30 ml) reduces calibration costs and provides fast response times.
  • Low maintenance and safe design.
  • Simple and easy-to-use modular design.
  • Bubble rejection system.
  • Eliminate bubbles without delaying response time.
  • Modular microprocessor-based technology, which guarantees a high quality of information.
  • Self-cleaning (except MicroTOL 2 and 5).
  • Automatic and continuous ultrasonic self-cleaning under EPA 180.1 standards for self-cleaning meters and turbidimeter.
Measurement Principle
Nephelometry (90 °)
They range from 0.02 to 10, 0.02 to 100, and 0.02 to 1000 NTU depending on the model
0.0001 Selectable
2% of reading or ± 0.02 below 40 NTU (0-500 NTU)
5% of reading above 40 NTU (500-1,100 NTU)
Response time
Adjustable response time (5 to 500 seconds) 0 to 1000 NTU
Standard outputs
Isolated 4-20 mA galvanic or RS-485
RS-485 Protocols
Modbus, HF Simplebus, HF online interface
User alarms
2 User selectable high / low alarms
Light source
White or infrared (LED 850nm)
Operating temperature
0 ° -50 ° C (32 ° to 122 ° F)
Inlet pressure
1 - 200 psi (built in regulator set at 15 psi)
Custom multi-line LCD (backlight option)
USEPA, ISO 7027, CE approved, ETL Listed UL 3111-1 and ETL certified to CSA 22.0 No. 1010-1-92

HF Scientific is the leader in online measurement and analysis turbidimeters.

The HF Scientific MicroTOLS Online Turbidimeter complies with EPA and ISO 7027 regulations and standards.

Features include: quick and easy calibration, verifies in seconds, + low maintenance, safe design that ensures your instrument always delivers accurate reading, bubble rejection system, automatic and continuous ultrasonic autoclean system (except MicroTOL # 2 and # 5 models), and data acquisition software system that allows data logging and storage for multiple turbidimeters.

Data sheet

MicroTOL Turbidity Meter

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