TAC 640 Portable PPM Oxygen Analyzer with USB Data Logging & Sample System

  • 0–1 PPM Low Range; 0–25% High Range
  • Large Backlit Display w/ User Friendly Menu
  • Data Log via Removable USB Flash Drive
  • Integral Swagelok Bypass Valve System
  • Continuous Analysis during Charging
  • Electrochemical Sensor Technology

The TAC-640 oxygen analyzer combines a rugged portable design with a precision oxygen sensor. The result is a highly reliable and cost-effective design with easy-to-use user interface.

The analyzer comes with a 0 – 10 PPM full scale low range and a removable USB flash drive for data logging via .CSV (Excel) file format. With an 8GB USB Flash Drive, you can data log for 1-minute intervals for about 50 years before running out of storage. The low full-scale range and flexibility to easily access data allows this analyzer to be unmatched in the market.

The display of the analyzer is designed to be used in direct sunlight. No need to bring a shade or other method to see the screen.

The oxygen sensor used in the TAC-640 is an electrochemical fuel cell principal. All oxygen sensors are manufactured in the United States under a strict quality program.

The standard cell (TO2-133) is unaffected by other background gases such as H2, He or Hydrocarbons.
The acidic cell (TO2-233) works well when acid gases such as CO2 or Natural Gas are present.

The sensors are self-contained and minimal maintenance is required — no need to clean electrodes or add electrolyte.

Each unit comes with a membrane filter with needle valve to provide a sample free of liquids and a regulator for sampling. The regulator can be used for a maximum input pressure of 1500psig and will provide an output pressure of 10pisg to the analyzer. Each analyzer comes in carrying case.


< +/- 1% of Full-Scale Range (at constant conditions)

Analysis Range


Battery Indicator

Integrated into Large Display



Data Logging

Removable USB Flash Drive


Large with Backlight


Brushed Stainless Steel

Flow Sensitivity

0.5 – 5 SCFH

Sample Line Connection

1/4′′ NPT

Output (Analog)

0 – 1V DC


Rechargeable Battery
100 – 240 VAC AC Adapter

Estimated Battery Life

40 Hours before Recharge

Sample System

Flow Control, 4-way Sample/ Bypass Valve, Flow Indicator


TO2 – 133 Trace O2 Sensor

Sensor Life

9 – 12 Months


0 ̊ – 50 ̊ deg C

Temperature Compensation



12 Months


20 Pounds with Carrying Case

TAC 640 Portable PPM Oxygen Analyzer with USB Data Logging & Sample System Download