Patinas for Metal Artists
Barometric Pressure and Humidity
Photo Processes and Formulas
Science Experiments
Laboratory Procedures
Biodiesel Processing
This spare sensor is for HM Digital EC/TDS/Temp Combo Meter model COM-100. Features platinum TDS/EC sensor and thermister.
TDS 342 ppm TDS NaCl Calibration Solution, 89ml Cat. No. - NC-11105 $4.95
Replacement pH Electrode HI1270 (HI 1270) Cat. No. - NC-2106 $23.00
Conductivity Solution- 1413µS, 20ml. Cat. No. - NC-9431 $1.50