HI-781 MARINE NITRATE LOW RANGE CHECKER HC

-Range: 0.00 to 5.00 ppm (as NO3)
-Resolution: 0.01 ppm
-Accuracy: ±0.25 ppm ±2% of reading @ 25 °C (77 °F)
-Light source: Light Emitting Diode @ 525 nm
-Environment: 0 to 50 °C (32 to 122 °F); max. 95% RH non-condensing
-Battery type: 1.5V AAA Alkaline
-Auto shut-off: After 20 minutes of non-use and 4 minutes after reading
-Dimensions: 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
-Weight: 64 g (2.3 oz)