AS56-N Turbidity Probe

Single Channel Turbidity Probe

AS56-N is a probe for direct installation into pipelines and vessels measuring NIR light absorption (Turbidity or Solids Concentration) in various liquid flow streams. Two optical path length choices allow the measurement range to meet the process control requirements.

Used For

Turbidity scale:
- CU (concentration units)
Turbidity based
- phase separation control (Product / Water)
- inlet separator control
- yeast dosing / Brinks / harvesting
- control of CIP processes
- Wastewater solids

The AS56-N is a precision absorption probe, which is designed for direct installation into pipelines and provides accurate concentration measurements with remarkable repeatability, linearity and resolution. It is typically used in food and beverage applications to allow cost-effective measurements. The AS56-N uses light from 730-970 nm to measure solids concentration independent from color or color changes (e.g., yeast concentration in beer during tank draining). It’s lowered power design allows for up to four AS56 series sensors to be multiplexed to one C4000 converter / transmitter.

Features

Benefits

Inline turbidity measurement in demanding process conditions

No sampling or by-pass installation needed

Fast and accurate turbidity measurements

Immediate detection of turbidity changes to verify product quality

Probe design

For pipe and vessel installation

AS56-N
Schematic	OPL Windows Lamp module Optics modules (incl. filter) Detector module No window gaskets used
Measurement
Measurement principle	1- Channel Absorption of light
Measurement wavelength(s)	AS56-N:730 - 970 nm
Detector(s)	1 silicon photodiode (hermetically sealed)
Measuring Range	AS56-N: any measuring range between 0 - 0.05 to 4 CU
Optical path length	5 or 10 mm
Calibration	CU (concentration units) application specific calibration
Light source	special incandescent tungsten lamp 5.0 V DC, 450 mA typical life span: 3 to 5 years (25,000 to 40,000 hours)
Resolution	< ± 0.5 % of respective measuring range
Repeatability	< ± 1.0 % of respective measuring range
Linearity	< ± 2 % of respective measuring range (specific to application)
Protection	all optical parts have an IP rating of IP65 or higher
Process Adaption
Material	wetted parts: stainless steel 1.4435 (SS 316L) surface: N6: Ra < 0,8 μm (32 µinch) - electropolished housing: stainless steel 1.4571 (SS 316Ti)
Port connection	thread G1-1/4 in., ISO 228/1 for port AS25 (similar Ingold-port) diameter: 25 mm ( D= 25 H7) O-ring groove for 30 mm and for 60 mm port length
Port gasket	O-ring 18.64 x 3.53 mm EPDM (FDA / USP Class VI)
Insertion depth	35 mm (1.38 in.) + OPL at a port length of 60 mm (2.36 in.)
Process pressure	0 - 10 bar (0 - 145 psi)
Windows	Sapphire (seal-less)
Installation accessories	weld-in ports Varivent adapter (50.00) clamp adapter (1.5 and 2.0 in.)
Temperature Ratings
Process temperature	permanent:0 - 90 °C (32 - 194 °F) peak 60 min/day:0 - 100 °C (32 - 212 °F)
Ambient temperature	operation:0 - 40 °C (32 - 104 °F) transport:-20 - 70 °C ( -4 - 158 °F)
Pressure and temperature ratings specified herein may be subject to limitations - see instruction manual. The appropriate choice of material for all wetted parts is the sole responsibility of the user. Data given are subject to changes without prior notice.