Myron L Instruments

Myron L Instruments

Pure Aqua delivers Myron L Instruments for water quality testers to gain information to act upon for the purposes of ascertaining the degree of contaminants existing in their water supply. The amount and type of impurities lead to unwanted occurrences such as scaling, bad taste, odor, pollution, corrosion, etc. By testing the water with our instruments, operators will be able to determine the best approach to addressing these issues.

Myron water quality instruments are renowned for their rapid, precise, and immediate results in measuring pH and conductivity, including ensuring the safety of equipment, water quality, and maximum reliability. 



  • 34 Conductivity/TDS ranges
  • Built-in Calibration
  • Auto Temp. Compensation
  • IP65/NEMA 4X


  • 7 Resistivity ranges
  • Auto Temp. Compensation
  • Selectable 115/230 VAC
  • IP65/NEMA 4X
Myron L 720II pH/ORP


  • Built-in Calibration
  • pH 0-14
  • ORP ±2000 mV
  • Selectable 115/230 VAC

Pure Aqua has over 20 years of experience as a global provider of Myron L Instruments. These water quality instruments are the leading instruments of their kind, offering high quality and easy to use conductivity and pH instrumentation.

The Myron L Company function reports FAC quickly and accurately by measuring ORP, the chemical characteristic of chlorine that directly reflects its effectivity, cross referenced with pH. Both DPD kits and colorimeters may tell the user the FAC value of the sample in the test tube, but since the chemistry of that sample is quite different from the source water being analyzed, the results are imprecisely related to actual disinfection power. The Myron L Company function measures the real, unaltered chemistry of source water, including moment-to-moment changes in that chemistry.

Quality You Can Trust

Both Ultrameter II models deliver performance of ±1% of reading (not merely full scale). This high level of accuracy has been achieved through advanced four-electrode conductivity cell technology, a unique pH/ORP sensor and powerful microprocessor-based circuitry. With displayed values of up to 9999, the full four-digit LCD ensures resolution levels never before possible in such affordable water quality instruments. Factory calibrated with NIST traceable solutions, each Ultrameter II may be supplied with both certification of traceability and NIST traceable solutions for definitive calibration.

Fast and accurate in the laboratory, both Ultrameter II models are rugged enough for daily in-line controller checks in hostile process applications.

Innovative Engineering

The Ultrameter II is a prime example of how high-tech engineering can greatly simplify and streamline a task. Whether in the lab, industrial plant, or in a remote field location, merely:

1. Fill the cell cup
2. Push a parameter key
3. Take the reading

Temperature compensation and range selection are both rapid and automatic. The Ultrameter II is a true one-hand operation instrument.

Easy to Calibrate

All calibrations are quickly accomplished by pressing the –² or –¼ keys to agree with our NIST traceable Standard Solution. When calibration is necessary, display prompts simplify pH calibration and make sure the correct buffer is being used. Plus, all parameters (excluding factory-set temperature) have an internal electronic setting that can be used for field calibration and as a check on pH/ORP sensor life.

Advanced Features:
  • 3 solution standards for greatest accuracy in diverse applications
  • Fully automatic temperature compensation
  • User adjustable temperature compensation (up to 9.99%/°C) which also allows TC to be disabled for applications requiring non-compensated readings.
  • User adjustable conductivity/TDS conversion ratio for greater accuracy when measuring solutions not contained in the microprocessor.
  • Auto-shutoff maximizes the life of the single 9V battery to more than 100 hours/5000 tests.
  • Non-volatile microprocessor provides data back-up, even when the battery is changed. This assures all calibrations and memory data will be retained.
  • Extended life pH/ORP sensor is user replaceable in the field.