The HG253 represents a new standard for Mercury detection. It is a precise，accurate and portable solution to your mercury analysis requirements。The large color touch screen, seen in the picture above，sets a new standard for operational simplicity. Also, samples are recorded in non-volatile memory for laboratory reference，automatically time and date stamped for compliance with Good Laboratory practice（GLP）practice。HG253's on-board monitoring circuits continually check the status of batteries, detectors，and calibration for unparalleled reliability. The HG253 employs atomic absorption methodology for true mercury detection，avoiding costly and time consuming false posities。As an atomic absorption method instrument, the HG253 does not require regeneration periods.