HM Digital Hydromaster 500 - Continuous pH/TDS/EC/Temp Meter

Continuous Nutrient Solution Monitoring With Alarms - 11 x 11 x 17 in Shipping Box

Spot checks miss changes in a reservoir between readings. This continuous meter tracks pH, TDS, EC and temperature together and sounds an alarm when a value leaves the range you set. Its readings use automatic temperature compensation, and it lists accuracy of ± 0.1 pH and ± 2 % for TDS and EC.

Sold as a single unit, this meter suits an indoor grower or a small commercial room that wants one device watching a reservoir. It can be carried, set on a bench or mounted on a wall.

Key Features & Benefits

• Adjustable high and low alarms — set limits that suit your solution, and switch the alarm off when you do not need it.
• Rechargeable battery or AC power — place it where it is useful, or run it from the mains on a 110 V to 220 V supply.
• Touch screen with auto backlight — read values easily in dim rooms.
• Data storage — record up to 20 measurement readings for later comparison.
• Three year warranty — coverage is listed by the distributor.

Who Should Use Hydromaster 500

Growers running hydroponic systems who want to watch pH, nutrient strength and solution temperature in one place. It also suits anyone who prefers a wall-mounted or benchtop monitor to a handheld pen.

About HM Digital Hydromaster 500

The Hydromaster 500 is a continuous pH, TDS, EC and temperature monitor from HM Digital. It measures pH from 0.00 to 14.00, EC to 20.00 mS, TDS to 9999 ppm and temperature from 0.0 to 80.0 °C. It uses a single junction pH sensor and a platinum-electrode EC probe on a 24-inch shielded coaxial cable, and it is RF resistant.

Frequently Asked Questions

Q: How is a continuous monitor different from a pen meter?
A: A pen meter gives a reading only when you dip it. A continuous monitor stays in the solution and can alarm when values drift, so you do not need to remember to check.

Q: What does ATC mean?
A: ATC is automatic temperature compensation. It adjusts readings for solution temperature so values stay comparable as the reservoir warms or cools.

Q: Can I mount it on a wall?
A: Yes. It is listed for portable, wall mount or benchtop use.

Q: How does it save power?
A: It shuts off automatically after 5 minutes. It runs from a rechargeable lithium ion battery or from AC power.

Q: Which scales does it display?
A: It shows pH, temperature in °C or °F, TDS in ppm or ppt, and EC in µS or mS.