TB211 IR
It measures turbidity in water samples from 0.01 to 1100 NTU, using infrared light scattered at 90° as described in EN ISO 7027. Use it as a portable turbidimeter that runs on a 9 V battery. It stores 125 data sets in its internal memory.
Highlights
A temperature-compensated 860 nm LED measures nephelometric scattered light at 90°, as provided in EN ISO 7027.
The detection limit is 0.01 NTU. Accuracy is ± 2.5 % of reading or ± 0.01 NTU, whichever is bigger, up to 500 NTU.
An internal ring memory holds 125 data sets, alongside a real-time clock and date. The interface is Micro-USB.
It measures 110 x 55 x 190 mm, weighs 400 g as the basic unit and has splash-proof polycarbonate membrane operation.
Parameters
Turbidity
The range extends to 1100 NTU, but accuracy is only specified up to 1000 NTU, so readings above that carry no stated accuracy.
Accuracy across the range
Reagents & consumables
We keep these in stock for the TB211 IR. We quote part numbers per instrument on enquiry, checked against the current price list.
Calibration standards
Calibration standards, pH buffers and electrolyte solutions for calibrating the instrument.
Cuvettes & sample cells
Round cells, cuvettes and caps.
Specifications
Standards
Turbidity measured as scattered light at 90° with infrared light (860 nm), as provided in EN ISO 7027. Source: page 1 description and Technical Data table.
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Common questions
What is the measuring range of the Lovibond TB211 IR?
The range is 0.01 to 1100 NTU with autorange. Accuracy is specified up to 1000 NTU, so ask us if you need to work between 1000 and 1100 NTU.
Which standard does the TB211 IR follow?
It uses the nephelometric method of EN ISO 7027. An 860 nm infrared LED measures scattered light at an angle of 90°.
What accuracy can I expect?
From 0.01 to 500 NTU it is ± 2.5 % of reading or ± 0.01 NTU, whichever is bigger. From 500 to 1000 NTU it is ± 5 % of reading.
Does it read in NTU or FNU?
The specification lists the units as TE/F = NTU = FNU. It gives no separate FNU range or accuracy.
What is supplied with the TB211 IR?
It comes in a carrying case with four turbidity standards (< 0.1, 20, 200 and 800 NTU) and a 9 V battery. Two 24 mm vials with lids, a 1.5 m USB cable, warranty information, a Certificate of Compliance and the instruction manual are also included.
How do I get stored readings off the instrument?
It keeps 125 data sets in an internal ring memory and has a Micro-USB interface. The data sheet does not describe transfer software or file format, so ask us before you plan a workflow.
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