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Tango TX1

Portable Single Gas

Tango TX1

First-ever single gas monitor that uses two sensors to detect the same gas

Patent pending DualSense™ Technology makes users of the Tango 85 times safer

Three years of continuous battery runtime


CO, H2S, NO2, SO2


By wearing the Tango™ TX1, 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™.




Overmolded composite construction

Rugged design provides exceptional durability in harsh, industrial environments

Compact size and weight

Multi-gas protection in single-gas size enables true portability as a personal monitor when used with or without the pump

IP66/67 Certified

Ensures that the monitor can withstand use in extremely dusty and wet applications

One to four-gas configurations

Allows you to select and expand your sensor configuration to meet your monitoring needs at any time

Broad sensor measuring ranges

Measuring ranges for carbon monoxide to 1000 ppm, hydrogen sulfide to 500 ppm, nitrogen dioxide to 150 ppm and sulfur dioxide to 150 ppm provide the ability to see changes in hazardous conditions beyond normal monitoring ranges

Interchangeable lithium-ion and alkaline battery packs

Rechargeable lithium-ion battery packs offer day-to-day use for up to 12 hours continuously, while alkaline batteries provide an emergency backup power supply or an alternative primary power source for applications where instruments are used less frequently

Lithium-ion extended range battery pack

Rechargeable lithium-ion extended range battery packs offer day-to-day use for up to 20 hours continuously when using the instrument without the pump

Integrated sample-draw operation

One instrument can be carried for continuous monitoring or be used with the integrated sampling pump for sample-draw applications such as confined space entry testing

Optional language instrument

Available in English, French and German with predominantly icon-driven displays for ease of use by a diverse workforce

PEAK reading storage

Provides quick access to an on-screen review of highest exposure conditions after alarm events without the need to download datalogged information

On-board continuous datalogging

Storage of a minimum of three months of sensor data allows for routine review of gas exposures, revealing areas of safety concern and potential improvement

Audible, visual and vibrating alarms

95 dB audible, ultra bright visual and strong vibration alarms provide multiple clear warnings in high-noise, low-light conditions

Programmable bump test mode

Prompts user to bump test instrument on a regular basis and provides an alarm that prevents use if bump test has not been performed at the desired interval

Calibration overdue alarm

Prompts user and prevents normal use if instrument has not been calibrated within the prescribed timeframe

STEL and TWA readings and alarms

Short-term and time-weighted average exposure measurements and alarms allow users to potentially set instantaneous alarms at higher levels, allowing work to continue safely while still providing alarms in conditions of prolonged exposure at lower gas concentrations

Quick-Cal calibration mode

Saves time and money by allowing all sensors to be calibrated simultaneously using one cylinder of blended calibration gas

DS2 Docking Station™ compatible

Provides automatic calibration, bump testing, instrument diagnostics and record keeping, simplifying instrument management while you concentrate on other tasks; Just dock it – and walk away

iNet™ Ready

Gives you Gas Detection as a Service on the world’s premier instrument management system. iNet provides factory monitoring and servicing of your gas detection fleet without the need to purchase a single piece of equipment.

Available in Safety Orange

Bright orange overmold enables increased visibility in dark, confined spaces





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 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.)


-20°C to +50°C (-4°F to +122°F)


15%-95% Non-condensing (continuous)


IP66; IP67


CO, H2S, NO2, SO2 - Electrochemical sensor technology


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


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



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


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

China Ex

Ex ia IIC T4 Ga



Permissible Gas Monitor


Ex ia IIC T4; Zone 0


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.