HM Digital TDS 1000 ppm Calibration Solution - 20 ml Packets - 20 Count

Fresh Reference Solution for Every Meter Check - 20 Packets

A TDS or EC meter drifts over time, and nutrient mixes made from drifting readings can leave plants underfed or overfed. This sodium chloride-based 1000 ppm solution gives you a known reference to calibrate against, and each sealed packet means you never reuse solution contaminated by an earlier dip.

One unit holds 20 packets of 20 ml each. That suits a regular indoor grower who calibrates on a routine schedule, and it works equally well for a small commercial room that wants a clean reference for every check.

Key Features & Benefits

• 1000 ppm reference value — gives you a standard point for calibrating TDS meters.
• Equivalent EC value of 2000 µS — lets you calibrate EC meters with the same solution.
• Single-use 20 ml packets — each calibration starts with uncontaminated solution.
• Sodium chloride-based — a common standard for checking nutrient-solution meters.
• 20 packets per unit — enough for many calibration checks.

Who Should Use HM Digital TDS 1000 ppm Calibration Solution

Use it if you measure nutrient strength in hydroponic systems or soil-free cultivation and want readings you can trust. It suits home gardeners, and licensed commercial growers who calibrate several meters.

About HM Digital TDS 1000 ppm Calibration Solution

HM Digital makes water-quality meters and the solutions used to calibrate them. This product is a 1000 ppm sodium chloride-based calibration solution supplied as 20 packets of 20 ml. The manufacturer also publishes a TDS meter calibration instructions document.

Frequently Asked Questions

Q: What does this solution calibrate?
A: It calibrates TDS meters and EC meters. The reference value is 1000 ppm, which corresponds to 2000 µS.

Q: Why use packets instead of a bottle?
A: Each packet is opened once, so no solution is contaminated by repeated dipping. A bottle can pick up residue over time and shift its value.

Q: What does TDS mean?
A: TDS stands for total dissolved solids, the amount of dissolved material in water, shown in parts per million (ppm). In hydroponics it indicates nutrient concentration.

Q: How should I store the packets?
A: Keep them in a cool, dry place away from direct sunlight. Check the packaging for the expiration date before use.

Q: Is it hazardous to ship?
A: It is not classed as a hazardous material.

Q: How do I run the calibration?
A: Follow your meter's own procedure. HM Digital provides a TDS meter calibration instructions document you can consult.