DHT Hb 523 Haemoglobinometer

Hemoglobinometer
DHT Hb523

overview

Introduction

The DHT Hb523 Hemoglobinometer is a specialised digital photometer for measurement of blood haemoglobin concentration by its optical density (a linear correlation).
For photometry, the prepared test sample and hemolysing diluent are mixed and placed in a standard 10mm photometric cuvette, which is then placed in the DHT Hb523 reading aperture.
The optical density of the haemolysed blood solution is instantly measured over a narrow spectral band, automatically converted to Hb concentration in g/l to display on a liquid crystal display (LCD).

The measurement of the optical density is carried out at a wavelength of 523nm, in the region of intersection of absorption curves of various haemoglobin forms, ensuring their detection with equal sensitivity.
Precision and excellent reproducibility are ensured at this wavelength by the unique optical circuit with narrow-band interference optical filters and the very high sensitivity electronic signal processing.
In contrast to other photometers and colorimeters, no zero adjustment or calibration is normally required and no calibrating solutions are needed. The supplied individual Control Standard (a special permanent coloured glass optical filter) is uniquely matched to each unit and is used to verify factory calibration for user batch control.

Description

Maximum dimensions (W, D, H,): 178 x 127 x 43 mm. Weight (with batteries): 360gm.

Measurement range: 0-300g/l

There are no controls to operate. Measurement is initiated automatically and repeated every 4 seconds whilst a cuvette or the supplied Control Standard is present in the DHT Hb523 .
Each measurement is accompanied by a short audible signal and the result is instantly displayed directly as Hb concentration in g/l (range: 0 to 300) on the liquid crystal display. The measured haemoglobin concentration value remains displayed whilst the cuvette is in the aperture and for up to 30 seconds after removal.
The meter then automatically turns off and stays off until the next measurement is initiated by reinsertion of a cuvette.
Last reading is stored and may be recalled from memory by single press of button “ L ” on rear of the meter.