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T40 II Rattler™ Portable Single Gas Monitor and T-Dock™ 

Protect workers in hazardous environments with the T40 II RattlerTM.  The T40 II RattlerTM is a compact, lightweight, and robust Portable Single Gas Monitor with rapid sensor response time so workers can better take action during dangerous situations.  And the available T-Dock™ accessory offers automated management and ultra-fast bump testing for 8 instruments simultaneously.

The T40 II Rattler™ and T-Dock™ are currently only available for ordering in Asia Pacific, Europe, Middle East, Africa, and Turkey.


A Robust, Reliable, and Flexible Portable Single Gas Monitor

Trust the gas detector that understands the importance of time and accuracy in dangerous situations. The T40 II RattlerTM  has a sub 10s T90 sensor response time that informs workers immediately if hazards arise.


Sub 10s T90 sensor response to better inform team of hazards.

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Endure the harshest conditions thanks to an IP68 rating.


Get two-year run time with a replaceable battery that eliminates the need for a charging station.

Test Drive the T40 II Rattler™ and T-Dock™

T40 II_CO_1000ppm_Orange Front
Dust proof provides more reliability in hazardous environments

Small and lightweight allowing workers to comfortably wear all day long

Wide selection of measuring range to suit your application needs


Maintain up to 8 instruments simultaneously.

Bump test T40 II Rattler™ monitors in just 15 seconds.
No training needed -- simple interface is intuitive and one button starts all bump tests.

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T40 II Rattler™ and T-Dock™ Documents

Download up-to-date resources—including manuals, quick-start guides, specifications, and brochures—to optimize your T40 II Rattler™ and T-Dock™ usage.


T40 II Rattler Spec Sheet


T40 II Rattler Product Manual


T40 II Rattler Brochure


T40 II Rattler Application Note


T-Dock Spec Sheet


T40 II Rattler and T-Dock Brochure

T40 II Rattler™ Technical Specifications

Humidity Range

5% to 95% non-condensing

Temperature Range

-40 degrees C to 50 degrees C (-40 degrees F to 122 degrees F)

Sensors and Measuring Ranges

  • Carbon Monoxide (CO): 0 to 1000 ppm at 1 ppm resolution
  • Carbon Monoxide (CO): 0 to 2000 ppm at 1 ppm resolution
  • Hydrogen sulfide (H2S): 0 to 100 ppm at 0.1 ppm resolution
  • Hydrogen sulfide (H2S): 0 to 200 ppm at 0.1 ppm resolution
  • Hydrogen sulfide (H2S): 0 to 500 ppm at 0.1 ppm resolution
  • Oxygen (O2): 0 to 30% volume at 0.1% volume resolution


3.6 V Primary Lithium-thionyl chloride (Li-SOCI2), 1.5AH, 2/3AA, replaceable