- Detection - Measurement
- Flow, Pressure and Level Measurements
- Infrared turbidity sensor
- Exner Process Equipment GmbH
NIR turbidity sensor EXspect 291light scatteringcompacthigh-accuracy
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Characteristics
- Technology
- light scattering, NIR
- Other characteristics
- high-accuracy, for water, compact, 4-20mA, for wastewater
Description
Product overview
The EXspect 291 is a near-infrared (NIR) nephelometric turbidity sensor for continuous process monitoring in food, beverage, pharmaceutical and other industrial applications. It measures 90° scattered light and is optimised for very low turbidity levels such as post-filtration water. The sensor features a compact stainless-steel 1.4435 (316L) housing, a wear-free sapphire window, integrated signal processing electronics and a touchscreen display. Two alarm thresholds and an integrated switching output are available. Parameters can be configured via the display or the EXpert software.
Your advantages
Applications
Configuration
Technical specifications
The EXspect 291 is a near-infrared (NIR) nephelometric turbidity sensor for continuous process monitoring in food, beverage, pharmaceutical and other industrial applications. It measures 90° scattered light and is optimised for very low turbidity levels such as post-filtration water. The sensor features a compact stainless-steel 1.4435 (316L) housing, a wear-free sapphire window, integrated signal processing electronics and a touchscreen display. Two alarm thresholds and an integrated switching output are available. Parameters can be configured via the display or the EXpert software.
Your advantages
- Compact design with integrated amplifier
- Nephelometric measurement compliant with DIN EN 27027 and ISO 7027
- Durable sapphire window for long-term stability
- Hygienic design, CIP/SIP-capable
- No user calibration required
- LED light source for stable, low-drift signal
- Easy parameterisation via touchscreen or EXpert software
Applications
- Color-independent concentration and turbidity measurement
- Fresh water and wastewater monitoring
- Filter and post-filtration checks (breweries, water treatment)
- Reliable phase separation and separator control
- Process control in food and pharmaceutical production
Configuration
- Measuring range: 0...200 FNU / 0...200 NTU / 0...50 EBC
- Wetted material: Stainless steel 1.4435 (316L)
- Sealing material: without elastomer sealing
- Process connection: Varivent N DN40–125
- Interface options: Analogue 4...20 mA (M12 5-pin); Analogue 4...20 mA + digital (M12 8-pin)
- Display: Integrated touchscreen display
Technical specifications
- Max. measuring range: 0...200 FNU / 0...200 NTU / 0...50 EBC
- Resolution: 0.01 FNU / 0.01 NTU
- Accuracy: ≤ ±1 FNU / NTU
- Reproducibility: ±0.5 NTU under same process conditions
- Light source: LED
- Material: Stainless steel 1.4435 (316L)
- Surface finish: Ra <0.37 μm
- Window: Sapphire
- Supply voltage: 24 V DC
- Switch contact: NO or NC configurable, 150 mA
- Input contact: Zeroing
- Process temperature: -10...90 °C; 135 °C max for 1 hour (SIP cycle)
- Process pressure: Max. 16 bar (232 psi)
- Electrical connection: M12 connector 5-pin or 8-pin (digital configurable)
- Interfaces: 4...20 mA
- Protection class: IP69
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