NEEWER Digital Water Quality Test Pen PH Meter LCD Tester Hydroponics Hardness Test Pen
- Product Code: NW-931
- Availability: In Stock
-
$6.99
Specifications:
PH measurement range: 0.00~14.00
Error: ± 0.1PH
Accuracy: 0.01PH
Temperature compensation: 0 ℃~70 ℃
Power supply: 3V button battery (without battery)
Screen display: High definition backlight
Working environment temperature: 0C-60 ℃
Calibration powder: 4.00/6.86/9.18
Size: 150 * 31 * 12
Calibration method:
6.86 Calibration) Insert into 6.86 calibration solution and press
CAL for five seconds to enter 6.86 calibration mode. The screen flashes
and the calibration is complete
(4.00 Calibration) Insert into the 4.00 calibration solution, long
press CAL for five seconds to enter 6.86 calibration, quickly press
again while flashing to enter 4.00 calibration, and wait for the screen
to finish flashing
(9.18 Calibration) Insert into the 9.18 calibration solution and
long press CAL for five seconds to enter 6.86 calibration. Press quickly
once while flashing to enter 4.00 calibration, and press again to enter
9.18 calibration. The calibration screen flashes completely
