Measuring range: 0 - 1000mg/cbm Measurment error: ≦?0% Relative Error: ≦?.5% Sampling range: respirable dust and general dust Sampling flow: 2L/minute Error: ≦?.5% Anti-exposion Model: Intrisically safe model used in mine ibI(150 centigrade) Dimension: 220x150x82mm Weight: 1.9kgs