Tango TX1 Gas Detector

A 3-year runtime and DualSense® Technology increases worker safety, regardless of bump test frequency, while reducing overall costs.

  • First-ever single gas detector that uses two sensors to detect the same gas
  • DualSense® Technology makes users of the Tango 85 times safer
  • Three years of continuous battery runtime

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  1. CO , H 2 S , NO 2 , SO 2


    By wearing the Tango™ TX1 Portable gas detector, your workers will be the safest single gas monitor users in the world. A 3-year runtime and patent pending DualSense™ Technology increases worker safety, regardless of bump test frequency, while reducing overall costs.


    • Significantly increases worker safety - DualSense Technology ensures that regardless of your current bump test policy, you will be significantly safer with the Tango than with any other single gas instrument on the market today. *  
    • Longer battery life - Operates continuously in an "always-on" mode for three years. After the battery can no longer support instrument life, it can be replaced for another three years of continuous operation.
    • Louder instrument alarm - Alarms at 100dB at 10 centimeters making it twice the volume of Industrial Scientific's GasBadge units and louder than any single gas instrument on the market. Alarm volume can be increased by about 10dB for higher-noise environments with the addition of the optional AlarmAmp™.

    *Based on iNet® data including more than 2 million bump tests and 100,000 unique sensors.


DualSense Technology significantly increases worker safety, regardless of bump test frequency.

The Tango incorporates revolutionary patent pending DualSense™ Technology, which was developed to address one of the biggest challenges facing single gas instrument users - bump testing instruments to ensure they are properly detecting gas and alarming. DualSense Technology includes two of the same type sensor for detection of a single gas. The two sensor readings are processed through a proprietary algorithm and displayed as a single reading to the user.

Learn how DualSense Technology increases gas detector reliability.

DualSense White paper

DualSense™ Technology: Why two are safer than one


Instrument Warranty:

Three-year warranty which does not include battery, sensors and filters.

CO and H2S sensors are warranted for 3 years from the initial purchase date.

All other sensors are warranted for 2 years from the initial purchase date.


Segment liquid crystal display (LCD)


Two buttons

Case materials:

Case top: Polycarbonate with a protective rubber overmold

Case bottom: Conductive polycarbonate


Three strobe-emitting visual alarm LEDs (two red; one blue);

100 decibel (dB) audible alarm at a distance of 10 cm (3.94"); Vibration alarm


99 x 51 x 35 mm (3.9" x 2.0" x 1.4")


126.0 g (4.4 oz.)

Operating temperature range:

-40°C to +50°C (-40°F to +122°F)

Operating Humidity Range:

15%-95% Non-condensing (continuous)


IP66; IP67


CO, H2S, NO2, SO2, CO/H 2 low - Electrochemical sensor technology

Sensor Measuring Ranges:

Carbon Monoxide (CO): 1 to 1,000 ppm in 1 ppm increments

Hydrogen Sulfide (H2S): 0.0 to 200.0 ppm in 0.1 ppm increments

Nitrogen Dioxide (NO2): 0.0 to 150.0 ppm in 0.1 ppm increments

Sulfur Dioxide (SO2): 0.0 to 150.0 ppm in 0.1 ppm increments

Carbon Monoxide (CO/H2 low): 0.0 to 1,000.0 ppm in 1 ppm increments

Battery Pack:

3.6 V Primary lithium-thionyl chloride (Li-SOCl2), 1.5AH, 2/3AA, replaceable, nonrechargeable

-40°C to +50°C (-40°F to +122°F)


Ex ia I Ma

Ex ia IIC T4 Ga

Equipment Group and Category: I M1 and II 1G


Ex ia I Ma

Ex ia IIC T4 Ga


Class I, Groups A, B, C, and D; Class II, Groups E, F, and G; T4; Exia

Class I, Zone 0, AEx ia IIC T4

-20°C to +50°C (-4°F to +122°F)


Ex ia IIC; Class I, Groups A B C D; T4

China Ex

Ex ia IIC T4 Ga


Ex ia IIC T4; Zone 0



Permissible Gas Monitor


Ex ia IIC T4 Ga

China MA

Safety Certificate of Approval for Mining Products


These specifications are based on performance averages and may vary by instrument.

*The Tango is warranted to be free from defects in material and workmanship under normal and proper use and service for 3 years from the initial purchase date.

  1. Ordering information

    Part Number


    Instrument Configurations


    Tango TX1, CO


    Tango TX1, H2S


    Tango TX1, NO2


    Tango TX1, SO2


    Tango TX1, CO/H2low

  1. Ordering information

    Part Number




    DSX™ Docking Station for Tango TX1

    1. DSX Mode:
         0 = DSX Standalone
         1 = DSXi Cloud-connected
         2 = DSX-L Local Server
    2. Number of Gas Inlet Ports:
         3 = 3 Ports
         6 = 6 Ports
    3. Power Cord Type:  1 = North America, 2 = EU, 3 = AUS, 4 = UK


    Replacement battery


    Soft nylon case, Black


    Soft nylon case, Orange


    Dust barrier kit, 5 pack


    Water barrier kit, 5 pack


    CalCup and tubing kit


    Belt clip


    AlarmAmp™, Black


    AlarmAmp™, Safety Orange


    Black nameplate


    Green nameplate


    Yellow nameplate


    Blue nameplate


    White nameplate

    *Accessto data from the iNet DS docking station requires a subscription to iNet oriNet InSite.

    *DSX Docking Station Kits Include: Choice of Standalone or Cloud-connected 3-port DSX docking station, 116L calibration gas (appropriate mix) with demand flow regulator with iGas® pressure switch, North American power cord, USB storage device (Standalone only).