E-314 waterproof plastic shell pH composite electrode, laboratory conventional pH test electrode, Use: can continuously test pH value in flowing water; cannot be used for strong acid and strong solution testing. Color: Brown black Material: ABS<br><br>E-314 main parameters: 1. Measuring range: 0-14PH 2. Measuring temperature: 5-60℃ 3. Zero potential: 7±0.5PH (25℃) 4. Percentage theoretical slope: () ≥98.5% (25℃) 5. Internal resistance: ≤250MΩ (25℃) 6. error: 0.2PH (1mol/L) Na+, PH14) (25℃) 7. Response time: ≤1 minute<br><br>Package Contents: 1 set of E-314 PH Electrode Sensor (Due to the angle and lighting of the photo, it is brown in the sun.)<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.