The Stevens-Greenspan Turbidity Sensors provide accurate and precise turbidity readings over a range of adverse environmental conditions. An innovative optical system provides accurate measurements even at low turbidities, while the advanced optical surface treatment resists fouling.

Sensor Output:

• TS 100: 4-20mA
• TS 300: RS 232 (also includes internal data logging)
• TS 1200: SDI-12 serial

Sensor Features:

• 2000 NTU range
• +/- 3.0% FS accuracy
• +/- 3.0% FS linearity for 0 - 50 NTU
• +/- 12.0% FS linearity for 0 - 2000 NTU
• 10 - 14V supply voltage
• 2 second warm-up to first reading

Make more accurate turbidity measurements with Stevens-Greenspan’s state of the art turbidity sensor

The Stevens-Greenspan Turbidity Sensor offers a unique combination of superior features:

• Highly sensitive system based on array of high gain infrared optics provides excellent accuracy at low turbidities.
• Exceptional ambient light rejection is achieved with infrared transmission modulation.
• Advanced polymer coating of optical system resists fouling and minimizes field maintenance requirements.
• Digital temperature compensation technology ensures stable performance over a wide temperature range.

The Stevens-Greenspan turbidity sensor design is based upon an infrared emitter and receiver module and an electronic detection and measurement unit. The optical system transmits an infrared beam of 860nm and detects the backscatter intensity to determine turbidity.

Experience has shown that the major factor in accurate continuous monitoring of turbidity is the cleanliness of the optical lens. Stevens- Greenspan has coated the lens with a state of the art polymer to reduce any material or growth adhering to the optical face, thus prolonging the interval between site visits.

Accurate and stable turbidity readings are ensured through the use of Stevens-Greenspan’s advanced filtering techniques to eliminate interfering light sources. Both the optical geometry and infrared wavelength conform to ISO 7027 “Method by measurement of attenuated radiation”. Temperature compensation is achieved with a sophisticated digital sampling technique to respond instantly to possible temperature induced errors.