Specifications
Unit Product Weight: 0.4 lbs
Features and Benefits
- Measures electrical conductivity (EC), total dissolved solids (TDS) and temperature.
- Digital Calibration (push button) to any point within the meter's range
- Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries
- Display: large and easy-to-read LCD screen
Resources
HM Digital, Inc. is the only manufacturer of economical in-line dual TDS monitors that measure total dissolved solids (TDS) levels of feed and product water lines simultaneously, an effective way to compare rejection rates and gauge reverse osmosis membrane, water filter and water purification performance.
With HM Digital water testing instruments, you'll know if your water is pure.
Directions
Care & Maintenance
Do not drop or completely submerge the unit in water or dip beyond the maximum immersion level. This unit is not watertight and is not covered under the warranty if water gets into the unit. (NOTE - The COM-100, PH-200 and ORP-200 are watertight and completely submersible. Please ensure that the battery compartment and probe gasket ring are firmly tightened before submersing in water.)
Do not store the unit in high temperature or direct sunlight. This will shorten the lifespan of the product.
After repeated usage in high TDS water, it is advised to clean the electrodes to prevent residue build-up.
When necessary, clean the electrodes by soaking the tip in an acid (e.g., vinegar or diluted hydrochloric acid (muriatic acid)) and then rinsing well in water. If it is heavily fouled with organic material, soaking the tip in alcohol or bleach may help. Gentle wiping with a soft, nonabrasive cloth may also be acceptable.
For best results, always rinse the sensor pins in distilled water and allow to air dry before replacing the cap. TDS electrodes should be stored dry. (NOTE: pH and ORP electrodes must be stored in a special storage solution.)
The batteries may need to be replaced after extended usage or lifespan. To change the batteries, remove the top compartment of the meter (on the opposite end of the sensor for handhelds, on the rear of the unit for monitors) and insert new batteries according to the polarity of the diagram inside. Warranty
The COM-100 is covered by HM Digitals one year warranty. What is covered? Repair parts and labor, or replacement at the Company's option. Transportation charges for repaired or new product to be returned to the purchaser. All returned products MUST be included with a proof of purchase and a description of the problem for each product. If battery-powered, returned products MUST contain batteries (either dead or good). If a proof of purchase, batteries and problem description are not included, HM Digital reserves the right to refuse warranty service. 






