Thermo Scientific


Gemini gives military personnel, bomb technicians, hazmat teams and first responders significant tactical advantage, helping them minimize time on target and confidently make life-saving decisions.

The Gemini Analyzer is the first and only integrated Raman and FTIR handheld instrument in the world, providing complementary and confirmatory testing in a single, field-portable device.


Handheld analyzer

Gemini leverages the field-proven performance of Thermo Scientific FirstDefender and Thermo Scientific TruDefender instruments to accurately identify a broad range of solid and liquid chemicals, from explosives and chemical warfare agents to industrial chemicals and precursors.

Identify a broad range of unknown chemicals and explosives in the field quickly, safely, and confidently using FTIR and Raman spectroscopy in a single instrument, including low concentration analysis. The Thermo Scientific Gemini Analyzer with LowDoseID is the first to integrate these complementary and confirmatory chemical identification techniques in a rugged, lightweight, handheld solution.

The Gemini handheld analyzer minimizes time on target while delivering comprehensive and confirmatory results in a single, field-portable device, empowering military personnel, bomb technicians, hazmat teams and first responders to execute their missions quickly, safely and confidently. In addition to Raman scan delay, adjustable laser power, and other builtin safety features, Gemini introduces the industry’s first FTIR scan delay, enabled by the motorized anvil. Optional software enables users to virtually mix chemical substances, protecting themselves and the public from dangerous chemical combinations.

  • Better, faster decision making

  • Increased confidence in results

  • Safer Option

  • Easier to use, enhanced efficiency

  • Lightweight and Compact

  • Clear, color-coded, definitive test results

Intuitive Operation

The intuitive, graphical interface ensures that minimal training is required for proficiency. For new users, the Scan Assist feature guides technology selection with a series of easy questions. The consistent interface and workflow across technologies ensure that experienced operators can easily proceed with sampling.

Small footprint, big capability

The Gemini analyzer enables operators to quickly switch between analysis techniques. And, since they no longer need to sacrifice capability for weight, operators have robust analysis information quicker than ever before

Dual Technologies: Complementary and Confirmatory

Raman and FTIR are highly specific and reliable identification methods, each with strengths and limitations. By integrating both into a single analyzer, operators harness the power of each technology while enabling a broader range of chemical identification.

Clear Results

Built on the performance and reliability of the Thermo Scientific FirstDefender and TruDefender product lines, Gemini analyzers deliver accurate, color-coded results which require minimal user interpretation and provide a quick overview of the hazard at hand. Based on these results, operators can quickly and confidently proceed with their mission.

Designed for survivability

We understand the conditions operators face and the demands they place on equipment. From extreme climates to aggressive handling, Gemini has been certified to the latest military standards for ruggedness— drop, shock, vibration, temperature, immersion and much more

Detection Category
Chemical; Explosives
Detection Principle
Molecular Spectroscopy
10.1 x 5.7 x 2.4 in (26 x 14.5 x 6 cm)
<5 Lbs.; 4 Lbs. (1.81 kg)
Power Requirements
Lithium Battery; AC/DC Line Power; Rechargeable lithium ion battery, SureFire disposable batteries, Standard AC power
Extreme Temperatures/Humidity; Waterproof/Resistant; Dust; Vibration/Shock; IP-67 rated for decontamination and MIL-810-G for survivability
Operating Temperature
–20 to 50°C (-4 to 122°F)
Tested for Chemical Agents
Tested for Explosives
Tested for Narcotics
Start-up Time (From Cold Start To Sample Ready)
Response Time (Sample Application To Output)
<1 minute; < 40 seconds
Total Run Time
0 to 20 minutes
Alarm Capability
Calibrating Schedule
Self Calibrating
Data Export Formats
SPC file (for use in standard spectroscopic software), text file, or JPEG report
Product Type
Handheld Raman/FTIR Spectrometer
Power Supply
Internal 3.7V lithium polymer (QTY 1) battery pack
Internal CR123A (QTY 3) batteries
DC wall adapter, 12 V DC 1.25 A
Spectral Range
4,000 cm-1 to 650 cm-1
250 cm-1 to 2875 cm-1

Gemini Handheld Chemical Identification | Thermo Scientific

Thermo Gemini