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Handheld gas detector model 721 with dual-line backlit display and soft carrying case

TEST PRODUCTS INTL. 721 Gas Detector 0-9999 ppm 0-19.9%LEL

SKU CH-JRK0-42PS9

A combustible gas detector measuring 0-9999 ppm and 0-19.9% LEL with adjustable tick rate, earphone jack, backlit dual-line display, and calibrated sensor included

  • TypeEnvironmental & Mechanical
  • Detects up to 9999 ppm for precise leak location
  • Measures up to 19.9% LEL for safety compliance
  • Adjustable tick rate gives audible leak indication
  • Earphone jack allows use in noisy environments
  • Backlit dual-line display with bargraph reads clearly in darkness

Combustible Gas Detector 721

The TEST PRODUCTS INTL. 721 detects combustible gases including acetone, acetylene, alcohol, ammonia, benzene, butane, ethanol, ethylene oxide, gasoline, hexane, hydrogen, methane, naphtha, paint thinners, propane and solvents. It is designed for professionals who need to identify leaks or hazardous concentrations in industrial, automotive or confined-space environments. The two-line display with bargraph and backlight provides clear readings in varying light conditions.

Measurement Range 0-9999 ppm / 0-19.9% LEL

The detector covers a concentration range of 0 to 9999 ppm and 0 to 19.9% LEL, which determines whether it suits the target gas levels in your application. An adjustable tick rate lets the user match the audible indication to the environment. Buyers who need detection outside these limits or for specific toxic gases not listed should select a different instrument.

Included Sensor, Case and Earphone Jack

A calibrated sensor is installed and ready for immediate use, while the soft carrying case protects the unit during transport and storage. The earphone jack allows private audio monitoring in noisy surroundings so the adjustable tick rate remains effective. Calibration certificates are available separately for users who require documented traceability.

Highlights

  • Detects up to 9999 ppm for precise leak location
  • Measures up to 19.9% LEL for safety compliance
  • Adjustable tick rate gives audible leak indication
  • Earphone jack allows use in noisy environments
  • Backlit dual-line display with bargraph reads clearly in darkness

Specifications

BrandTEST PRODUCTS INTL.
TypeEnvironmental & Mechanical

Questions about this item

What does the 9999 ppm upper limit mean when I am scanning for leaks?

The detector will display concentrations up to 9999 parts per million, so you can track rising levels well past the point where most safety alarms would trigger.

How does the 19.9 %LEL ceiling affect what I can measure?

Readings stop at 19.9 percent of the lower explosive limit, giving you a clear margin before concentrations reach a flammable range.

What does the unit need to operate in a 104 °F environment?

It is rated for a maximum operating temperature of 104 degrees Fahrenheit, so no extra cooling is required up to that ambient heat.

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