Oakton (WD-35653-01) pH 4.01 Pouches 20-Box r30 bb 93 4x41 2 } The Oakton WD-35661-08 replacement

} The Oakton WD-35661-08 replacement electrode restores accurate readings to your TDSTestr+ and ECTestr+ meters when the original sensor degrades from extended use

and whole-building commercial installations requiring reliable low-pressure operation

Requires standard 4-inch diameter pressure vessels rated for at least 300 psi

and check for leaks at all connection points

Oakton (WD-35653-01) pH 4.01 Pouches 20-Box r30 bb 93 4x41 2 } The Oakton WD-35661-08 replacementOakton Laboratory Calibration Solutions Oakton WD 35653 01 pH 4. 01 Calibration Pouches NIST traceable single use pH buffer pouches for reliable field and laboratory calibration NIST Traceable Standards 0. 01 pH Accuracy at 25C Premixed & Ready to Use 20 Single Use Pouches The Oakton WD 35653 01 delivers laboratory grade pH calibration in a convenient single use format. Each pouch contains pH 4. 01 buffer solution standardized against NIST references