An inexpensive essential for keeping shrimp! Built in temperature compensation and thermometer:
-Measurement Range: 0-9990 ppm , 1 ppm Resolution, +/- 2% Readout Accuracy.
-Temperature Button: Test water temperature, 31 - 200 F degrees, 1 F degree resolution.
-Hold Function: saves measurements for convenient reading and recordingBattery LR44 Button Cell not included.