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The new Myron L Ultrapen PT2 is designed to be extremely accurate, fast and simple to use in diverse water quality applications. Advanced features include automatic temperature compensation; highly stable microprocessor-based circuitry; user-intuitive design; and waterproof housing. A true one-handed instrument, the PT2 is easy to calibrate and easy to use. To take a measurement, you simply push a button then dip the pen in solution. Results display in seconds.

High Performance Features

  • Accuracy of ±1% of READING ±.2% at calibration point
  • Reliable Repeatable Results
  • Automatic temperature compensation
  • Autoranging
  • Accuracy of benchtop lab equipment in an affordable, portable, compact pen
  • Rugged, reliable, shock-resistant fully encapsulated electronics, body constructed of aircraft aluminum
  • Simple one button function
  • Specially designed with measurement ranges and solution modes to meet the water quality testing needs of many applications
  • High capacity N-type battery included
  • Waterproof


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Advanced Design Superior Perfomance

pH / Temperature

Package Contents

PT1 Pocket Test Pen - battery installed
Pocket Clip
Operating Instructions


Standard Solutions for calibration:
The ULTRAPEN™ PT2 requires pH 4, pH 7, and pH 10 buffer solutions for wet calibration and pH Sensor Storage Solution for proper storage.
Order models#: ML-PH4, ML-PH7, ML-PH10, and ML-PHSS

Replacement pH Sensor:
The ULTRAPEN™ PT2 features a user replaceable pH sensor. Installation instructions included with sensor.
Order model#: ML-RPT2


The PT2, excluding the pH sensor, has a one (1) year limited warranty. The pH sensor has a six (6) month limited warranty.

Brochure and Operation Manual for Download

Ultrapen_PT2_ Data Sheet (includes specifications and options) PDF

Ultrapen_PT2_ Operation Manual PDF
0.00-14.00 pH
0 - 71° C / 32 - 160° F
± 0.01 pH (After Wet Calibration)
± 0.1 ºC / ± 0.1 ºF
± 0.01
± 0.1 ºC / ± 0.1 ºF
0.01 pH
0.1 ºC / 0.1 ºF
Time to Reading Stabilization: 10-30 seconds       
Power Consumption: Active Mode 37 mA, Sleep Mode 2 µA       
Temperature Compensation: Automatic to 25ºC       
Physical Dimensions: 17.15 cm L x 1.59 cm D or 6.75 in. L x .625 in. D       
Weight: 54 g/1.9 oz. (without soaker cap and lanyard)       
Case Material: Anodized Aircraft Aluminum with Protective Coating       
Battery Type: N type, Alkaline, 1.5V       
Calibration Solutions: pH 4, pH 7, pH 10       
Operating/Storage Temperature: 0 - 55ºC or 32 - 131ºF       
Enclosure Ratings: IP67 and NEMA 6       
EN61236-1: 2006 – Annex A: 2008: Electrostatic discharge to case of instrument may cause PT2 to spontaneously power on. If this happens, the PT2 will power itself off within seconds.