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HM Digital Handheld Meters

HM Digital Handheld Meters
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* Precision aquarium water testing meters at hobby-friendly prices
* Accurately and effortlessly measure multiple water parameters
* ISO 9001 certified meters deliver professional result for aquarium hobbyists

Professional handheld digital meters at an unbeatable price! HM Digital Handheld Meters offer superior construction and performance to aquarium hobbyists at a very economic cost. Precision devices boast advanced microprocessor technology to ensure exceptional reliability. User-friendly features including multiple parameter measurement, easy-to-read LCD screen, auto-off function, automatic temperature compensation, factory calibration and more keeps high-tech water testing simple!

The PH-200 measures pH and temperature with superior accuracy. Waterproof pH meter is ideal for measuring pH levels in freshwater or saltwater aquariums. Handheld meter will float if accidentally released into your aquarium. Includes batteries, lanyard, pH 7.0 buffer, clear cap and storage solution. pH measurement range of 0-14 with a 0.01 resolution accurate within +/-0.02. Temperature measurement range of 32-176°F with a resolution of 0.1°F accurate within +/-2%.

Features

  • Measures pH and temperature.
  • Auto-ranging three point calibration with digital fine tuning.
  • Waterproof housing.
  • Simultaneous temperature display.
  • Digital automatic calibration (one point), with digital fine tuning.
  • Data-hold function and low-battery indicator.
  • Replaceable Sensor (model SP-P2).
  • Factory Calibrated: The PH-200 meter is three-point factory calibrated to 4, 7, and 10 pH. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver.

The TDS-3 measures TDS (Total Dissolved Solids) and temperature. The TDS-3 is the world's most popular TDS meter and is the most reliable and longest lasting meter of its kind. Ideal for all water purification applications, the TDS-3 is a great for measuring the quality of your reverse osmosis water to ensure pure, clean water for aquarium use. Includes a carrying case with belt clip. TDS measurement range of 0-9990 ppm with a resolution of 1 ppm accurate within +/-2%. Temperature measurement range of 32-176°F with a resolution of 0.1°F accurate within +/-2%.

Features

  • Measures TDS and temperature
  • Hold Function saves measurements for convenient reading and recording
  • Auto-off function shuts off meter automatically after 10 minutes of non-use to conserve batteries
  • Factory calibrated with a 342 ppm NaCl solution
  • Meter can be recalibrated with a mini-screwdriver
  • "x10" mode reads in increments only of 10 ppm (0-9990 ppm)

The COM-100 measures EC (Electrical Conductivity), TDS (Total Dissolved Solids) and temperature. Waterproof combination meter is upgraded to measure parameters in four different scales allowing for a variety of uses and greater versatility and accuracy. Handheld meter will float if accidentally released into your reverse osmosis storage container. Professional level EC/TDS meter is your choice to ensure your reverse osmosis unit is producing the purest, highest quality water for aquarium use. Includes a cap, batteries and lanyard. EC measurement range of 0-9990 µS; 0-9.99 mS with +/-2% accuracy. TDS measurement range of 0-8560 ppm (mg/L); 0-8.56 ppt with +/-2% accuracy. EC and TDS resolution to 0.1 µS/ppm. Temperature measurement range of 32-176°F with a resolution of 0.1°F accurate within +/-2%.

Features

  • Measures TDS, EC and temperature.
  • Four scales: µS, mS, ppm, ppt (mS and ppt are new)
  • Three different non-linear EC-to-TDS conversion factors (KCl, 442TM, NaCl).
  • Automatic Temperature Compensation (ATC) using three temperature coefficients.
  • Waterproof housing.
  • Digital Calibration (push button) to any point within the meter's range.
  • Data-hold function and low-battery indicator.
  • Replaceable Sensor (model SP-C1).
  • Factory Calibrated: The COM-100 meter is calibrated with a 1413 µS solution. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver.

Specifications

  PH-200 TDS-3 COM-100
Range pH: 0-14
Temp.: 32-176 °F
TDS: 0-9990 ppm (mg/L)
Temp.: 32-176 °F
EC: 0-9990 µS; 0-9.99 mS
TDS: 0-8560 ppm (mg/L); 0-8.56 ppt
Temp.: 32-176 °F
Resolution pH: 0.01
Temp.: 0.1 °C/F
1 ppm, 1 degree Celsius 0-99: 0.1 µS/ppm/mS/ppt
100-999: 1 µS/ppm
1000-9990: 10 µS/ppm
Temp.: 0.1 °C/F
Accuracy pH: +/-0.02
Temp: +/-2%
+/- 2% Accuracy: +/-2%
Power source 3 x 1.5V button cell
batteries (included)
(357A)
2 x 1.5V button cell
batteries (included)
(357A)
3 x 1.5V button cell
batteries (included)
(357A)
Dimensions 1.3" dia x 7.3" 6.1" x 1.25" x 1" high 1.3" dia x 7.3"

Please note: While meters are automatically calibrated by the manufacturer, unavoidable jarring during shipping may affect calibration. Therefore, you should re-calibrate your tester using a Calibration Solution (sold separately) prior to initial use.

3 fl oz 1000 ppm Calibration Solution is a NaCl solution that is 1060 as KCl, 1450 as "442" and 2000 µS.

pH Buffer Packets include 3 powder packets of 4.0 pH, 6 packets of 7.0 pH, 3 packets of 10.01 pH and one empty 100 ml bottle. Each powder packet makes 100 ml of solution (when mixed with distilled or deionized water).

When not in use, rinse the pH electrode with water to minimize contamination and use pH Storage Solution (sold separately) in the protective cap. 60 cc pH Storage Solution is a specially formulated KCl solution for pH and electrodes (sensors). Combination twist-off and eyedropper style cap allow simple use.

Downloadable TDS Meter General Usage and Calibration Instructions PDF.
(Requires Adobe Acrobat Reader 4.0 or later - get it here for free)

Shop all Aquarium Controllers & Monitors.

Please click "More Information" for tips on calibration.

pH-Temp Meter (mfg# HM PH-200),   CD-79337,   $79.95
TDS/Temp Meter (mfg# HM TDS-3),   CD-79343,   $22.20
TDS/EC/Temp Meter (mfg# HM COM-100),   CD-79338,   $59.95
1000 ppm Calibration Solution (mfg# HM C-1000),   CD-79340,   $4.95
pH/ORP Storage Solution (mfg# HM OP-STOR),   CD-79341,   $6.95
pH Buffer Packets (mfg# HM PH-BUF),   CD-79342,   $9.95
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Please note: Return of electrical equipment to Drs. Foster & Smith for exchange or refund is limited to 60 days from the date of purchase. Beyond 60 days, please contact the manufacturer for repair or replacement as covered by the manufacturer's warranty.

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