HM Digital Replacement TDS/EC Sensor for COM-100 - Measures EC, TDS and Temperature

Restore Nutrient Readings Without Replacing the Meter - Single Sensor

A worn or damaged probe makes nutrient solution readings unreliable, and it can leave you with a meter you can no longer trust. This replacement sensor fits the HM Digital COM-100 and brings back measurement of conductivity (EC), TDS and temperature. It uses stainless steel sensor pins in an ABS probe body, so you replace only the part that has failed.

Sold as a single sensor, it suits any grower who keeps a COM-100 in service, from a home gardener with one hydroponic system to a commercial operation that needs working meters on hand. Confirm your meter model before ordering.

Key Features & Benefits

• Measures EC, TDS and temperature — one sensor covers the readings you use to manage nutrient solution strength.
• Stainless steel sensor pins — the contact points are made of metal suited to repeated use in solution.
• ABS probe body — a rigid plastic housing protects the sensor assembly.
• Built-in thermometer — temperature is read alongside conductivity.
• Replacement format — you keep your existing meter instead of buying a new one.

Who Should Use HM Digital Replacement TDS/EC Sensor for COM-100

Growers who own a COM-100 and see drifting, erratic or failed readings should consider this sensor. It also suits anyone who wants a spare on hand for hydroponic systems, reservoirs or nutrient mixing.

About HM Digital Replacement TDS/EC Sensor

HM Digital makes meters and controllers for water and nutrient monitoring. This replacement sensor, product code HM-SP-C1, is listed for the COM-100 and measures conductivity (EC), TDS and temperature. The probe is made of ABS with stainless steel sensor pins.

Frequently Asked Questions

Q: What does this sensor measure?
A: It measures conductivity (EC), TDS and temperature. It includes a thermometer for the temperature reading.

Q: Which meter does it fit?
A: It is listed as a replacement for the COM-100. Check your meter model before ordering, because the distributor text also mentions another model number.

Q: What is the sensor made of?
A: The probe body is ABS plastic and the sensor pins are stainless steel.

Q: What is EC?
A: EC is electrical conductivity, a measure of how well a solution carries current. In hydroponic systems it indicates the concentration of dissolved nutrients.

Q: What is TDS?
A: TDS means total dissolved solids, the amount of dissolved material in the water. Meters usually estimate it from conductivity.

Q: How many come in an order?
A: It is sold individually, one sensor per unit.