Simple pocket pH tester ideal for testing water samples. The interchangeable probe is small enough to fit into a test tube, requiring only a small sample for testing. Manual two point calibration, the Checker 1 is supplied with batteries and a calibration screwdriver.
- pH range/resolution: 0.00 to 14.00
- Accuracy: ±0.2pH
- Battery: 2 x 1.5v/approx. 3000 hours