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Tango® TX1 Single-Gas Detector

Eliminate distractions with a lightweight and wearable personal monitor that offers maintenance-free gas detection. A two-year runtime and patented DualSense® Technology increase worker safety, regardless of bump test frequency, while reducing overall costs.

Tango TX1

One of the Safest Single-Gas Monitors on the Market

Trust the gas detector that puts safety first and reduces your overall costs. The Tango TX1 uses DualSense Technology to increase worker safety by eliminating the risk of sensor failure.


Get the most accurate gas readings using redundant sensor technology to detect the same gas type.

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Stop worrying about repairing or replacing equipment with the industry’s only Guaranteed for Life™ warranty.


Increase audible alarms to 110 dB with optional AlarmAmp™.

Test Drive the Tango TX1

Tango TX1

Easy-to-read display

DualSense Technology to reduce the risk of sensor failure

Replaceable batteries that eliminate the need for daily charging.

DualSense Technology

Stay better protected with DualSense. This technology uses redundant sensors to determine the concentration of the target gas in the atmosphere and reduce the risk of monitor failure.

Download the White Paper

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Tango TX1 Documents

Download up-to-date resources—including manuals, quick-start guides, specifications, and brochures—to optimize your Tango TX1 usage.


Sensors Available by Monitor

Declaration of Conformity

Tango TX1 Declaration of Conformity

Spec Sheet

Tango TX1 Spec Sheet

Product Manual

Tango TX1 Product Manual

Tango TX1 Frequently Asked Questions

What makes the Tango TX1 different from other single-gas monitors on the market today?

Wearing the Tango TX1 with DualSense™ Technology makes you one of the safest single-gas monitor users in the world. Using redundant sensors for detection of the same gas eliminates the pain of balancing cost, safety, and bump test frequency. Additionally, with a two-year battery life, the costs of monitor replacement are eliminated and downtime is reduced.

What is DualSense™ Technology?

DualSense™ Technology uses two of the same sensors for detection of a single gas. Readings are passed through a proprietary algorithm and a single monitor reading is displayed. This decreases the likelihood of a monitor not being able to detect gas out in the field, making DualSense monitors safer than single-sensor monitors.

How does DualSense Technology make the monitor “safer” than a single-sensor monitor?

The Tango uses sensor redundancy, reducing the likelihood of the monitor’s inability to detect gas. Below is a chart that shows the monitor failure rate of a single sensor monitor versus a monitor with DualSense Technology when bump tested daily or not bump tested at all. In either case, the Tango elevates the level of safety regardless of the customer’s current bump test policy.

                                      Single-Sensor            DualSense Technology

Daily Bump Test        Failure is 1 in 1,265    Failure is 1 in 116,257 — 92 Times Safer

No Bump Testing      Failure is 1 in 286      Failure is 1 in 21,319 — 74 Times Safer


* This bump test failure data is based on records collected through iNet®, Industrial Scientific’s gas detection subscription service.

If one of the sensors fail in my Tango, can I still use the monitor?

Yes. A worker will still be protected and can continue working in the field if the sensor fails. Because of sensor redundancy, if a sensor were to fail in the field, the monitor will still continue to operate normally. In addition, if a sensor fails a calibration or a zero fault has occurred, Tango will operate the same as any other single-sensor monitor would.

Can the user change the sensor type in the Tango?

Yes. Sensors are changeable, allowing the user to convert the Tango from one gas type to another.

Can I order a Tango TX1 as a two-gas monitor?

No. The primary advantage of DualSense™ Technology would be lost if converted to a two-gas monitor. If you are looking for a two-gas monitor, check out the Tango TX2.

What is the warranty of the Tango TX1?

The Tango TX1 is Guaranteed for Life™ to ensure customers always have the highest quality monitor.

Tango TX1 Technical Specifications


Guaranteed for Life™. Warranted for as long as the monitor is supported by Industrial Scientific Corporation (excludes sensors, batteries, and filters). CO and H2S sensors are warranted for three years. All other sensors are warranted for two years.

Temperature Range

-40 °C to 50 °C (-40 °F to 122 °F) ** ATEX, IECEx, CSA, INMETRO and UL (C-US)

Humidity Range

15-95% non-condensing (continuous)

Sensors and Measuring Ranges

Carbon monoxide (CO): 0 to 1,000 ppm in 1 ppm increments

Carbon monoxide (CO/H2 low): 0 to 1,000 ppm in 1 ppm increments

Hydrogen sulfide (H2S): 0.0 to 500.0 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;

non-rechargeable; always on; two-year run time depending on operating conditions