Dual-Color Smart Backlight Water Quality Tester Pen 3-in-1 TDS Meter Conductivity & Temperature Detector

1. Purpose: Basis for detecting the replacement cycle of water purifier filter elements. To ensure clean drinking water.
2. 3-in-1 multi-function detection: TDS value/conductivity/temperature, switch modes by pressing the Mode button.
3. Accurate data, high-definition backlight, red light warning when TDS exceeds 40ppm.
4. Lock function: Automatic locking for easy reading and recording, the instrument will lock the reading.
5. Auto-shutdown function after 5 minutes of inactivity.

Parameters:
1. Measurement range:
--TDS: 0~9990 ppm,
--Conductivity: 0-9990 us/cm
2. Accuracy: +/-2 percent
3. Green light on when TDS is less than 40ppm; red light on when TDS is greater than 40ppm.
4. Temperature range: 0-99 Celsius (32-212 Fahrenheit)
5. Battery: 1.5V x 2 button cells
6. Net weight: 53g
7. Dimensions: 15.5x3x1.5 cm