HM Digital TDS-3 Handheld TDS meter

Commercial-Grade Handheld TDS Meter With Carrying Case

Field and commercial testing calls for a meter that survives daily transport without losing accuracy, which is where a lot of consumer-grade TDS pens fall short. The TDS-3 is built for that use, reading across a 0 to 9990 PPM range with microprocessor-driven accuracy and shipping in a carrying case with a belt clip for easy transport.

Resolution steps down as the reading climbs: 1 PPM increments below 1000 PPM for fine detail at typical nutrient concentrations, then 10 PPM increments from 1000 to 9990 PPM with a blinking display indicator marking the change.

Key Features & Benefits

• 0 to 9990 PPM range — covers everything from dilute nutrient solutions to concentrated commercial testing needs.
• 1 PPM resolution below 1000 PPM — fine enough detail for typical hydroponic nutrient concentrations.
• Microprocessor-driven readings — delivers efficient, accurate results rather than relying on simpler analog circuitry.
• Carrying case with belt clip — included for transport in commercial or field testing settings.

Who Should Use This TDS Meter

Growers, technicians, and professionals who need a portable, commercial-grade TDS meter that holds up to daily field or facility use.

About HM Digital

HM Digital's handheld meter lineup includes the TDS-3, built with microprocessor technology and rated for the kind of repeated commercial use that consumer-grade testers aren't designed to withstand.

Frequently Asked Questions

What is the TDS-3's measurement range?

It reads from 0 to 9990 PPM, covering both dilute and concentrated solutions in one meter. That single range spans everything from light nutrient mixes to heavily concentrated commercial solutions.

What's the resolution at typical nutrient concentrations?

Below 1000 PPM, the TDS-3 reads in 1 PPM increments. From 1000 to 9990 PPM, resolution steps up to 10 PPM increments, with a blinking indicator marking that the meter has shifted ranges.

Does it come with a case?

Yes, it includes a carrying case with a belt clip, sized for commercial or field transport. The case keeps the meter protected between test sites rather than riding loose in a bag or pocket.

How do I know this meter can handle daily commercial use?

It's built specifically for commercial-grade use with microprocessor-driven accuracy, rather than as a lighter-duty consumer pen. The included carrying case reflects that daily-transport intent.