Lineba High Accuracy ±2% Full Scale Digital TDS Water Quality ppm Meter and ±0.1 pH Digital PH Meter Tester Pen

Specifications for PH Meter Pen:
Measuring pH Range: 0.0 - 14.0 pH
Resolution: 0.1 pH
Operating Temperature: 0 - 50°C (32-122°F)
Relative Humidity: <95%
Life: approx.700hours of use
Calibration: manual,1 point
Size: 15.2cm x 2.8cm x 1.5cm
Do not be alarmed if white crystals appear around the cap
Turn the meter on sliding the swith on the cap
Immerse into solution up to the max immersion level
Stir gently and wait until the display stabilizes
After use,switch off pH meter,use the water clean the electrode and replace the protective cap
Do not use distilled or deionized water for storage purposes
Large fluctucations in readings could be due to lack of calibration,dry electrode or rundown batteries

Specifications for TDS Meter:
Range: 0-9990ppm
Resolution: 1ppm (0-999ppm) 10ppm (1000-9990ppm)
Accuracy: ±2% full scale
Calibration: Factory calibrated
Auto shut-off: 10 minutes
Temperature compensation: Automatic
Operating temperature: 0℃ to 50℃
Power source: 2 x 1.5V (button cell)
Size: (142 x 25 x 15)mm

Note:
1. If the meter cannot be switched on or the display fades, please replace the batteries, please pay attention to the polarity of battery
2. If pin electrode is dirty, clean by rinsing it in alcohol for one minute
3. Do not touch or scratch the pin electrode