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Ultrapen™ PT3

Ultrapen™ PT3

ORP/Redox & Temperature Pen

Product Info

This instrument is designed to be extremely accurate, fast, and simple to use in diverse water quality applications. Advanced features include highly stable microprocessor-based circuitry; automatic temperature compensation from 15ºC to 30ºC while in calibration mode; user-intuitive design; and waterproof housing. A true one-handed instrument, the PT3 is easy to calibrate and easy to use. To take a measurement, you simply push a button then dip the PT3 in solution. Results display in seconds.

ULTRAPEN™ PT3 Benefits:

  • Reliable Repeatable Results
  • Accurate
  • Affordable
  • Easy to Use
  • Rugged Design
  • Ensure Product Quality
  • Reduce Waste
  • Protect the Environment

ULTRAPEN™ PT3 High Performance Features:

  • Accuracy of ±10 mV ORP
  • Proprietary Sensor Design
  • 99.9% Pure Platinum Electrode
  • 3 Calibration Options with Automatic Solution Recognition
  • Automatic Temperature Compensation in Calibration Mode*
  • Rugged, reliable, shock-resistant fully encapsulated electronics
  • Durable body constructed of aircraft aluminum
  • Simple one-button functions
  • Temperature Readout
  • High capacity N-type battery included
  • Waterproof


  • PT3 Pocket Tester Pen – Battery Installed
  • User Replaceable ORP Sensor – Installed
  • Protective/Hydration Cap
  • Scoop
  • Pocket Clip
  • ORP Electrode Cleaning Paper
  • Quick Start Guide

ULTRAPEN™ PT3 Functions:

Hold (default) Once stabilized, the readings are captured then displayed.
LIVE Real-time readings are displayed continuously during measurement.

* Temperature compensation in calibration mode: Temperature affects the reaction potentials for all chemicals differently. True ORP is the direct measurement of electron activity during an oxidation-reduction reaction, regardless of temperature. However, for maximum accuracy and ease of calibration, the Myron L® Company has developed three calibration standard solutions with known dissolved species. We derived the temperature compensation (from 15ºC to 30ºC) for those solutions, and embedded automatic temperature compensation into the calibration function of your PT3. Note: To verify calibration while in measurement mode, you must manually correct for any variation in temperature. Example: @25ºC, ORP2602OZ calibration solution will read 260mV, however @ 20.0ºC ORP2602OZ will read 265mV.

ULTRAPEN™ PT3 Specifications:

ORP Range: -1000 mV to +1000 mV
ORP Accuracy: ± 10 mV
ORP Resolution: 1 mV ORP
Temperature Range: 0 – 71°C / 32 – 160°F
Temperature Accuracy: ± 0.1ºC
Temperature Resolution: 0.1ºC / 0.1ºF
Time to Reading Stabilization:  10 – 45 seconds
Power Consumption: Active Mode: 30 – 140 mA, Sleep Mode: 2 µA
Temperature Compensation:  Automatic In Calibration Mode From 15ºC to 30ºC
Physical Dimensions:  17.15 cm L x 1.59 cm D or 6.75 in. L x 0.625 in. D
Weight:  50.4 g / 1.78 oz. (without soaker cap and lanyard)
Case Material: Anodized Aircraft Aluminum with Protective Coating
Battery Type:  One N type, Alkaline, 1.5 V
Calibration Standard Solutions:  ORP80, ORP260, ORP470
Operating/Storage Temperature:  0 – 55ºC / 32 – 131ºF
Enclosure Ratings:  IP67 and NEMA6
EN61236-1: 2006 – Annex A: 2008:  Electrostatic discharge to the PT3 may cause it to spontaneously turn on. If this occurs, the PT3 will turn off.
WARNING! These products can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

ULTRAPEN™ PT3 Applications:

  • Agriculture
  • Hydroponics
  • Desalination
  • Aquaculture
  • Pharmaceutical
  • Boilers and Cooling Towers
  • Fountain Solutions for Printing
  • Horticulture
  • Wastewater
  • Pool and Spa
  • Food and Beverage
  • Irrigation
  • Reverse Osmosis
  • Plus Many More!



ULTRAPEN™ PT3 Accessories:

The ULTRAPEN™ PT3 requires Myron L® Company 80mV Quinhydrone, 260mV Quinhydrone, or 470mV MLC Light’s ORP Standard Solutions for wet calibration and Sensor Storage Solution for proper storage.

Order model #s:

ORP802OZ 80 mV Kit – Comes with Quinhydrone powder and 2oz. Bottle of PH7 solution
ORP2602OZ 260 mV Kit – Comes with Quinhydrone powder and 2oz. bottle of PH4 solution
ORP4701OZ 470 mV MLC Light’s Solution – 1oz. bottle
ORPCALKIT ORP Calibration Kit – includes all required solutions and powders for 80mV, 260mV, and 470mV calibration solutions**
**For additional calibration kits available, contact the Myron L® Company
PHSS Storage Solution – Available in 2 oz. or quart sized bottles
  • Replacement ORP Sensor:

The ULTRAPEN™ PT3 features a user replaceable ORP sensor. Installation instructions included with sensor.
Order model#: RPT3

  • ORP Electrode Cleaning Paper:

Routinely cleaning the electrode will keep the sensor free of build-up that can affect the speed and accuracy of ORP readings. Instructions for use are included with the paper.
Order model#s: OECP-25 for QTY 25 or OECP-100 for QTY 100


ULTRAPEN™ PT3 Downloads:

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