AP2 (NIR-Absorption)

Robust inline sensor for non-contact measurement of turbidity and particle concentrations in liquids using NIR absorption technology.

Typical Applications and Industries

Chemical Industry
Petrochemical Industry
Power Plants
Wastewater
Cooling Water
Drinking Water
Oil Separators
Stormwater Retention Tanks
Wastewater Treatment Plants
The turbidity sensor uses the principle of NIR absorption to accurately measure suspended solids in liquids. The sensor optics integrate an NIR LED light source and a high-precision photodiode detector. By measuring in the near-infrared range, the sensor delivers reliable and highly reproducible results that are largely unaffected by changes in product color. This makes the sensor ideal for demanding applications requiring precise and continuous turbidity monitoring.

The AP2 turbidity sensor is designed for long service life and minimal maintenance. It compensates for variations in product color, ensuring stable and reliable measurement results.

Built for continuous operation, the sensor features a long-life LED light source. High-quality materials such as stainless steel 1.4404 and sapphire measuring windows provide excellent chemical resistance and outstanding mechanical durability.

Thanks to its flexible process connections, freely configurable measuring ranges, and selectable engineering units (AU, ppm, mg/l, EBC, etc.), the AP2 can be adapted to a wide variety of process applications, offering a cost-effective solution for continuous turbidity measurement.

  • Nominal pipe size: Suitable for DN 25 and larger
  • Process pressure: PN 16 / ANSI Class 300
  • Process temperature: Max. 45 °C (up to 131 °C during short-term CIP)
  • Optional: Version for continuous operation up to 105 °C
  • Sensor material: Stainless steel 1.4404 / 316L
  • Window material: Sapphire
  • Seal material: EPDM (other materials available on request)
  • Measuring range: Typically 0–100 EBC, 0–500 EBC
  • Reproducibility: ±1%
  • Measuring wavelength: 880 nm (other wavelengths available on request)
  • Protection class: IP65 / NEMA 4X
  • Ex protection: ATEX Zone 1 & Zone 2 (optional)
  • Cleaning: CIP-compatible

The turbidity sensor uses the principle of NIR absorption to accurately measure suspended solids in liquids. The sensor optics integrate an NIR LED light source and a high-precision photodiode detector. By measuring in the near-infrared range, the sensor delivers reliable and highly reproducible results that are largely unaffected by changes in product color. This makes the sensor ideal for demanding applications requiring precise and continuous turbidity monitoring.

The AP2 turbidity sensor is designed for long service life and minimal maintenance. It compensates for variations in product color, ensuring stable and reliable measurement results.

Built for continuous operation, the sensor features a long-life LED light source. High-quality materials such as stainless steel 1.4404 and sapphire measuring windows provide excellent chemical resistance and outstanding mechanical durability.

Thanks to its flexible process connections, freely configurable measuring ranges, and selectable engineering units (AU, ppm, mg/l, EBC, etc.), the AP2 can be adapted to a wide variety of process applications, offering a cost-effective solution for continuous turbidity measurement.

  • Nominal pipe size: Suitable for DN 25 and larger
  • Process pressure: PN 16 / ANSI Class 300
  • Process temperature: Max. 45 °C (up to 131 °C during short-term CIP)
  • Optional: Version for continuous operation up to 105 °C
  • Sensor material: Stainless steel 1.4404 / 316L
  • Window material: Sapphire
  • Seal material: EPDM (other materials available on request)
  • Measuring range: Typically 0–100 EBC, 0–500 EBC
  • Reproducibility: ±1%
  • Measuring wavelength: 880 nm (other wavelengths available on request)
  • Protection class: IP65 / NEMA 4X
  • Ex protection: ATEX Zone 1 & Zone 2 (optional)
  • Cleaning: CIP-compatible
SIGNAL AMPLIFIERS

Model C1

Description

The Model C1 Signal Amplifier is compatible with most optical sensors from the Monitek and Chemtronic product ranges. System programming and calibration are carried out via a PC or laptop using intuitive menu-driven software. Calibration can be performed with one or multiple reference samples. All configuration settings and calibration data can be securely stored on the PC’s hard drive for backup and future use.

  • Operating temperature: Up to 45 °C
  • Housing material: Stainless steel 1.4301
  • Measuring range: Sensor-specific (programmable)
  • Interface: USB
  • Software: Configuration and calibration via Windows PC
  • Reproducibility: ±1%
  • Protection class: IP65 / NEMA 4X
  • Power supply: 90–260 VAC, 50–60 Hz (optional: 24 VDC ±10%)
  • Analog output: 4–20 mA, 500 Ω (isolated)
  • Relay outputs: Maximum contact load 24 VDC / 1 A

Model C2

Description

The C2 signal converter accurately processes the measurement signals from the AP2 turbidity sensor, making it ideal for monitoring and optimizing industrial processes. Featuring a TFT graphic display, 0/4–20 mA analog output, programmable switching outputs, and automatic self-diagnostics, it ensures reliable operation and seamless integration into continuous industrial process monitoring.

  • Power supply: 24 V DC ±10%
  • Power consumption: Max. 15 W
  • Switching outputs: 1 freely configurable relay (24 V / 2 A)
  • Fault output: 1 relay (24 V / 2 A)
  • Analog output: 0/4–20 mA
  • Reproducibility: ±1%
  • Operating temperature: −15 °C to +45 °C
  • Housing: ABS, DIN rail mounting
  • Protection class: IP30 / NEMA 1
 
 
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