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Ultrapen PT3 ORP/REDOX and Temperature Pen

Ultrapen PT3 ORP/REDOX and Temperature Pen

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.


  • 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
  • Temperature Readout
  • Waterproof
  • Powered by One N Type Battery (Included)


  • PT3 Pocket Tester Pen - Battery Installed
  • User Replaceable ORP Sensor - Installed
  • Scoop
  • Soaker Cap
  • Pocket Clip
  • Holster
  • Lanyard
  • ORP Electrode Cleaning Paper • Operating Instructions


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


ORP Range: -1000mV to +1000mV
ORP Accuracy: ± 10mV
ORP Resolution: 1mV ORP
Temperature Range: 0 - 71°C / 32 - 160°F
Temperature Accuracy: ± 0.1oC / ± 0.1oF
Temperature Resolution: 0.1oC / 0.1oF
Time to Reading Stabilization: 10 - 45 seconds
Power Consumption: Active Mode 30-100mA Sleep Mode 2μA
Temperature Compensation: Automatic In Calibration Mode From 15oC to 30oC
Physical Dimensions: 17.15cm L x 1.59cm D or 6.75in. L x 0.625in. D
Weight: 50.4g / 1.78oz. (without soaker cap and lanyard)
Case Material: Anodized Aircraft Aluminum with Protective Coating
Battery Type: One N type, Alkaline, 1.5V
Calibration Standard Solutions: ORP80, ORP260, ORP470
Operating/Storage Temperature: 0 - 55oC / 32 - 131oF
AL Enclosure Ratings: IP67 and NEMA6
mm 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.

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

Click to order Standard Solutions and Buffers

Routinely cleaning the platinum electrode will keep the sensor free of build-up that can affect the speed and accuracy of FCE free chlorine measurements. Instructions for use are included with the paper.

The ULTRAPENT™ PT3 features a use-replaceable ORP sensor with a unique porous liquid-junction. Installation instructions included with sensor.

The PT3, excluding the ORP sensor, has a one (1) year limited warranty. The ORP sensor has a six (6) month limited warranty.

Includes battery installed, soaker cap, scoop, pocket clip, holster, lanyard, ORP Electrode Cleaning Paper, operating instructions

Click for Operation Manuals / Instructions

  • Models: PT3, PTBT3, BATT11768, BATT11768-B3, RPT3, PTSC, OECP-25 & OECP-100
  • Manufactured by: Myron L®

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