AS16-N Turbidity Probe with a validation filter adapter

Turbidity probe inserted into a varivent pipeline viewed inline

Turbidity probe with a 40 mm optical path length

AS16-N Turbidity Probe

Single Channel Turbidity Probe

High precision probe for direct installation into pipelines and vessels measuring NIR light absorption (turbidity) of various liquid samples. The optical path length can be individually configured to meet the process control requirements with the highest accuracy.

Used For

Absorbance Scale:
- CU (concentration units)
Turbidity based
- phase separation control (beer / milk, milk / water)
- inlet separator control
- cell density in fermentation (OD, AU, TCD, CC, WCW, DCW)

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

Hygienic probe design (3A)

For pipe and vessel installation

Two sensor lengths available (35 mm & 135 mm plus OPL)

Flexibility to mount in a broad range of vessel sizes

Validation accessories

Easy on-site / on-demand verification

The AS16-N is a precision absorption probe, which is designed for direct installation into pipelines and vessels and provides accurate concentration measurements with remarkable repeatability, linearity and resolution. A wide selection of different optical path lengths and insertion depths combined with optional calibration filters and electro-polished stainless steel housing meet all requirements of the biotechnology industry.

The AS16-N uses light from 730-970 nm to measure solids concentration independent from color or color changes.

AS16-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)	AS16-N:730 - 970 nm
Detector(s)	1 silicon photodiode (hermetically sealed)
Measuring Range	AS16-N: any measuring range between 0 - 0.05 to 6 CU
Optical path length	1, 5, 10, 20 or 40 mm
Calibration	CU (concentration units) application specific calibration
Light source	special incandescent tungsten lamp 5.0 V DC, 970 mA typical life span: 3 to 5 years (25,000 to 40,000 hours)
Resolution	< ± 0.05 % of respective measuring range
Repeatability	< ± 0.5 % of respective measuring range
Linearity	< ± 1 % 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) dF < 1%, BN2 surface: N5: Ra < 0.4 μm (16 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.) 135 mm (5.31 in.) + OPL at a port length of 60 mm (2.36 in.)
Process pressure	0 - 20 bar (0 - 290 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 - 100 °C (32 - 212 °F) peak 60 min/day:0 - 150 °C (32 - 302 °F) peak 90 min/day:0 – 130 °C (32 – 266 °F)
Ambient temperature	operation:0 - 40 °C (32 - 104 °F) transport:-20 - 70 °C ( -4 - 158 °F)
Calibration
Calibration adapter	none
Calibration adapter VB	Filter adapter FH03 for calibration filter used for sensor verification
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.