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.
SPECIFICATIONS
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
WARRANTY
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