Applicable for Upstream + Downstream

Optical Sensor For Backscattering Measurement

EXspect 271

EXspect 271 is a highly accurate, compact NIR turbidity sensor for use in a range of medium- and high-turbidity process applications in the food industry, including dairies.

Last updated: January 12, 2023

EXspect 271

NIR backscattering sensor in compact design

The EXspect 271 is a highly accurate, compact NIR turbidity sensor for use in a variety of medium- and high-turbidity process applications in the food industry, such as in dairies. It’s a reliable back scattering sensor with an integrated transmitter thanks to its compact and durable structure in the stainless steel housing and non-wearing sapphire lens.

The turbidity value can be output via the standard interface 4…20 mA and displayed directly in the display in percent or a freely defined customer-specific unit. There are two alarm limits that can be set.

Your benefits

Technical Specifications*
*Subject to change without notice
Measuring range max.0-100 %turb
Resolution0,1 %
Accuracy± 1,5 % from measurement value
Reproducibility≤ 1 % from final value
Wavelength850 nm
Light sourceLED
Wetted materialStainless steel 1.4435 (316L)
SurfaceRa <0.37 µm e-polished
Measuring window (lens)Sapphire
Supply voltage24 V DC
ContactNO or NC configurable 150 mA
Input contactZeroing
Process connectionThread G1/2"
Process temperature-10...90 °C, 141 °C max. 2 hours (SIP cycle)
Process pressure0...20 bar (290 psi)
Electrical connectionM12 connector 5-pin or 8-pin (digital parameterisable)
Interfaces0/4...20 mA
ParameterisationSoftware EXpert
Protection glassIP69

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