Product Details Supplier Info More products

Hach Lange has introduced the DR3900, a spectrophotometer for water analysis that employs RFID technology to ensure an accurate and traceable record is created for every sample.

Users can define their own ‘set points’ for specific sampling locations so that any results falling outside of these points will be flagged immediately.

The company said this will be beneficial to application scientists, who may wish to be alerted to specific conditions such as deviation from normal C:N:P ratios.

In order to establish a fully traceable system, users will undertake the following procedure: place RFID tags in monitoring locations; provide sampling staff with personal RFID keyring fobs; utilise a portable, pocket-sized RFID locator to assign location and sampler ID data to the sample bottle RFID; and utilise cuvettes with new 2D barcode.

The DR3900 will then read sample RFIDs and assign traceability data to the analytical result – date, time, sampler, location and test method.

It will also read the sample barcode to determine the batch number and expiry date, and this data will also be assigned to the analytical result.

Small changes are sometimes made to analytical methods and these represent an opportunity for test errors to occur.

However, the introduction of the advanced Barcode 2 and RFID can prevent such errors because the DR3900 will issue a warning if a test requires an update.

By holding the cuvette box RFID label in front of theDR3900, the user is then able to update the test methodology in the spectrophotometer.

The barcodes also contribute to accuracy by alerting the user if reagents have expired.

Hach Lange said a further benefit of the DR3900 is made possible when the device is networked via Ethernet to facilitate the automatic calibration of the company’s online process monitoring instruments.

First, a ‘job’ is entered on the SC controller of the process instruments and a manual sample is taken.

The job (process measurement value, time, and so on) is sent to the DR3900 in the laboratory and the sample is analysed using a cuvette test.

The result is then compared with the process analyser and the calibration of the process probe is adjusted accordingly (when necessary).

View full profile