COM-100 HM Conductivity Meter

COM-100 HM Conductivity Meter for Indoor Growing

The COM-100 HM Conductivity Meter offers fast and reliable measurements in tanks, drains, and nutrient solutions, both in soil and in hydroponics and coco. It features three calibration modes, HOLD function, automatic shut-off, and a battery indicator to save energy.

The wide range allows you to work from very diluted solutions to concentrated recipes: 0–9990 µS/cm and 0–8560 ppm, with simultaneous reading on the LCD screen.

The body is water-resistant (not submersible), ideal for demanding work environments in indoor grow facilities.

Among the most useful technical data are: conductivity range 0–9.99 mS/cm, temperature range 0–55 ºC, temperature resolution 0.1 ºC, and EC accuracy ±2 %. The device operates with 2 AAA batteries, weighs approx. 667 g, and measures 18.5 × 3.4 × 3.4 cm, comfortable dimensions for daily tasks.

Designed to facilitate irrigation routines in cannabis cultivation, this meter helps diagnose excesses or deficiencies, preventing nutrient lockouts.

Within the range of grow meters and indoor accessories, it stands out for its stability, ease of use, and service in both large and small tanks, in tents or full rooms.

Indoor Growing COM-100 HM Conductivity Meter

In indoor growing the margins are tight: a high EC can cause osmotic stress and a low EC limits the real supply of nutrients. The COM-100 HM Conductivity Meter allows you to adjust recipes by phase (growth, transition, and flowering), control variations between tank refills, and verify that the starting water does not carry excess salts. In indoor grow facilities with automated irrigation, the combination of EC + temperature provides context on nutrient availability and the potential oxygenation of the solution.

What is the COM-100 HM Conductivity Meter for?

It is used to accurately measure electrical conductivity (EC), convert to TDS/PPM when you need to compare manufacturer tables, and monitor the water temperature. With this data, it is easier to decide whether to dilute, reinforce nutrients, or thermally stabilize the tank. In cannabis plants this control reduces trial and error, improves consistency between irrigations, and speeds up the detection of imbalances before foliar symptoms appear.

Tool for Indoor Growing COM-100 HM Conductivity Meter

This instrument integrates ATC, three calibration modes, and HOLD function to fix the reading while taking notes. The water-resistant chassis (not submersible) withstands typical splashes in the grow room. The electronics offer range 0–9.99 mS/cm, 0–55 ºC, and resolution 0.1 ºC, with ±2 % accuracy in EC, enough to fine-tune manufacturer recipes and custom adjustments in cannabis cultivation. A reputable online grow shop recommends it as the basis for daily control along with pH meters.

How is the COM-100 HM Conductivity Meter used?

1) Preparation: turn on, rinse the electrode with clean water, and dry with paper without rubbing. Check the AAA battery charge.
2) Calibration: perform digital calibration with conductivity standard solutions (e.g., 1413 µS/cm, 12.88 mS/cm). Repeat calibration periodically to maintain accuracy.
3) Measurement: immerse the tip in the sample without exceeding the recommended limit (not submersible). Wait for stabilization and, if necessary, activate HOLD to record the value. Switch between EC, TDS/PPM, and temperature as needed.
4) Decision making: if the EC is high, dilute with osmosis water; if it is low, gradually add nutrients. Consider the temperature to correctly interpret the reading (ATC helps, but it is advisable to keep the tank within the suitable range).
5) Maintenance: clean electrodes after each use with cleaning solution; store the device dry. Avoid fully submerging the meter body. Check calibration monthly with certified solutions.

COM-100 HM Conductivity Meter Price

The price of the COM-100 HM Conductivity Meter reflects features such as ATC, auto shut-off, HOLD, digital calibration, splash resistance, and extended range 0–9.99 mS/cm. Check the current offer, packs with standard solutions, and promotions at Hydroponics Blanes, a reference in grow meters and indoor accessories.

Where to buy COM-100 HM Conductivity Meter online?

Available at Hydroponics Blanes, trusted Grow Shop, and Grow Shop in Spain with discreet shipping. The online grow shop offers advice to integrate the meter into daily routines, choose calibration solutions, and optimize tank control in indoor grow facilities. Secure purchase and post-sale technical support.

As a compact alternative for irrigation control, the COM-100 HM Conductivity Meter simplifies repetitive tasks: checks EC, interprets TDS/PPM, and monitors temperature in real time.

A solid choice to standardize recipes and improve consistency in indoor growing projects focused on cannabis plants within the Grow Shop in Spain market.