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Ultrapen PT5 Dissolved Oxygen (DO) and Temperature Pen

Ultrapen PT5 Dissolved Oxygen (DO) and Temperature Pen

Professional Water Analysis

High Performance Features

  • Industry Leading Accuracy
  • Adjustable for Altitude and Salinity
  • 3 Calibration Methods: Air, Water and 0 ppm DO
  • Dynamic Membrane Temperature Correction
  • Easy to Use - One Button Control
  • Waterproof
  • Rugged Design with Aircraft Aluminum Body
  • Proprietary Sensor Design

PT5 Comes With:

  • PT5 Pocket Tester Pen - Battery Installed
  • Protective Cap
  • Pocket Clip
  • Holster
  • Lanyard
  • Operating Instructions

PT5 Measurement Modes

  • Hold - Displays real-time readings until stable or 3 minutes, which ever comes rst, then displays nal readings.
  • LIVE - Displays real-time readings continuously for up to 5 minutes.

PT5 Parameter Modes

  • DO Default - Display alternates between DO Concentration in ppm, DO Saturation in % and Temperature.
  • DO Concentration - Display alternates between DO Concentration in ppm and Temperature.
  • DO Saturation - Display alternates between DO Saturation in % and Temperature.


Measurement Range: DO Concentration: 0 - 20 ppm, DO Saturation 0 - 200%
Temperature: 0 - 71° C / 32 - 160° F
Accuracy: DO: ± 2% of Reading, Temperature: ± 0.1°C / ± 0.1°F
Repeatability: DO: ± 1% of Reading, Temperature: ± 0.1°C / ± 0.1°F
Resolution: DO Concentration: 0.01 ppm, DO Saturation 0.1%
Temperature ± 0.1°C / ± 0.1°F
Altitude Adjustment: -2,000 ft to 15,000 ft: increments of 100 ft
Salinity Adjustment: 0 - 50 ppt increments of 1 ppt
Time to Reading Stabilization: 10 - 180 seconds
Active Mode Power Consumption: Active Mode: 33 - 140 mA, Sleep Mode: 2 ?A
Temperature Adjustment for Membrane permeability: Automatic
Physical Dimensions: 17.15 cm L x 1.59 cm D or 6.75 in. L x .625 in. D
Weight: 57.4 g or 2 oz
Case Material: Anodized Aluminum with Protective Coating
Battery Type: N type, Alkaline 1.5 V
Calibration Methods: 1 or 2 Point; 0 ppm DO Calibration Solution and/or air or water
Operating Temperature: DO Saturation: 0 - 60°C / 32 - 140°F: DO Concentration: 0 - 40°C / 32 - 104°F
Storage Temperature: 0 - 55°C / 32 - 131°F
Water Resistance: IP67 and NEMA 6
EN61236-1: 2006 - Annex A: 2008; 1999/5/EC Annex III Electrostatic discharge to case of instrument may cause PT5 to spontaneously power on. In this case, the PT5 will power off after several seconds

Click to order Standard Solutions and Buffers

Standard Solutions: DOSOL 0 ppm Dissolved Oxygen Calibration Solution

The PT5, excluding the Sensor and Battery, has a one (1) year limited warranty.

Includes battery installed, protective/hydration cap, pocket clip, holster, lanyard, electrolyte solution (2 oz.), 3 membrane cap assemblies, syringe with tip, quick start guide

Click for Operation Manuals / Instructions

Myron L® Ultrapen™ Series units have probes that can freeze and break and must ship 2nd Day Air with a heat pack.
Ignoring this requirement voids the warranty.

  • Models: PT5, PTBT5, BATT11768, BATT11768-B3, RPT5, PTSC2, DOM5, DOSRE, DORS & DOM5K

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