Range : 0 to 150 mg/L (ppm)
Resolution : 1 mg/L
Accuracy @ 25°C (77°F) : ±1 mg/L ±5% of reading
Light Source : light emitting diode
Light Detector : silicon photocell with narrow band interference filter @ 466 nm
Power Supply : 9V battery
Auto-off : after ten minutes of non-use in measurement mode; after one hour of non-use in calibration mode; with last reading reminder
Environment : 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Method : adaptation of the turbidimetric method; sulfate is precipitated with barium chloride crystals and light absorbance of the suspension is measured
Dimensions : 193 x 104 x 69 mm (7.6 x 4.1 x 2.7”)
Weight : 360 g (12.7 oz.)