Go Direct® Chloride Ion-Selective Electrode (GDX-CL)
Specifications and User Guide

-Primary Test: Check the readings in the standards. The high should be around 1000 mg/L. The low should be around 10 mg/L.
-Secondary Test: Refer to General tips for using Ion Selective Electrodes (ISE).

Do any of your sensors require special storage?
Do you sell ISE Standards?
General tips for using Ion Selective Electrodes (ISE).
Can I use Vernier water quality sensors in salt water or in a salt water aquarium?
How do I sterilize an Ion-Selective Electrode?

If the sensor can be turned on when connected by USB but not when disconnected from USB, the battery either needs charging or has reached its end of life and can no longer hold a charge. First, try charging the sensor for several hours. If the sensor still won’t turn on when disconnected from USB, the battery has likely reached its end of life. If you intend to use this sensor wirelessly, the battery will need to be replaced. The rechargeable battery in this sensor is covered by a one year warranty but should last two to five years in typical use.
How do I replace the battery in a Go Direct Wand-Type Sensor?

Range (concentration) = 1 to 35,000 mg/L (or ppm)
Accuracy after calibration = ±10% of full scale (calibrated 10 to 1000 mg/L)
Interfering ions = CN–, Br–, I–, OH–, S2, NH3
pH range = 2–12 (no pH compensation)
Temperature range = 0–80°C (no temperature compensation)
Electrode slope = –56 ±3 mV/decade at 25°C
Electrode resistance = 1 to 5 MΩ
Minimum sample size = Must be submerged 2.8 cm (1.1 in)
Potential readings, typical = 114 mV in 1000 mg/L, 230 mV in 10 mg/L
dimension ISEA: 8.5 cm height x 3 cm wide x 1.75 cm depth
dimension electrode: 15.5 cm length, 12 mm OD
shaft diameter: 12mm OD

Standard Cl ISE Solution (CL-LST)
Standard Cl ISE Solution (CL-HST)