Ansi Engineers

Tethys Analyzers – Precision Gas Analysis Solutions

Tethys Instruments (often branded simply as Tethys) designs and manufactures a range of advanced gas analyzers and emission monitoring systems for industrial process control, environmental compliance, safety diagnostics, and combustion analysis. Tethys products combine rugged field-ready hardware with precise sensing technologies for reliable gas measurement in real-world industrial environments.

🧪 Core Analyzer Portfolio

🔹 Portable Emission Analyzers

Handheld or rugged portable analyzers for field testing and combustion diagnostics.
Key Uses: Boiler tuning, burner commissioning, engine testing, HVAC systems, and emission surveys.
Features:
✔ Multi-gas measurement (O₂, CO, NOx, SO₂, CO₂, HC)
✔ Integrated sampling pump and probe
✔ LCD display with menu navigation
✔ Built-in data logging and USB connectivity

🔹 Fixed/Stack Gas Analyzers

Continuous gas analyzers for industrial stacks and fixed emission monitoring.
Typical Gases Monitored:
• O₂ – Oxygen
• CO – Carbon Monoxide
• NO / NO₂ – Nitrogen Oxides
• SO₂ – Sulfur Dioxide
• H₂S – Hydrogen Sulfide
• CO₂ – Carbon Dioxide
• CH₄ / THC – Total Hydrocarbons

Features:
✔ Online continuous measurement
✔ High-precision electrochemical and infrared (NDIR) sensors
✔ Automatic calibration & sample conditioning
✔ Analog outputs (4–20 mA) & digital communications (Modbus, Ethernet)
✔ Alarm and relay output options

🔹 Process & Specialty Gas Analyzers

Analyzer systems for process gas monitoring, quality checks, safety and environmental regulations.
Applications:
• Combustion efficiency and optimization
• Flue gas and boiler emission compliance
• Industrial process control
• Environmental & regulatory reporting

🔑 Key Capabilities & Technologies

📊 Multi-Gas Measurement

Tethys analyzers can simultaneously measure multiple gas components to provide a complete emission profile and combustion efficiency assessment.

🔥 Advanced Sensor Technology

• Electrochemical (EC) sensors – High sensitivity for toxic gases (CO, NOx, SO₂, H₂S)
• Infrared (IR/NDIR) sensors – Accurate detection of CO₂ and hydrocarbons
• Paramagnetic O₂ sensors – Fast, reliable oxygen measurement

📈 User-Friendly Interfaces

• Large backlit LCD displays or touchscreen options
• On-board data storage and retrieval
• PC software for advanced analysis and reporting

🔄 Connectivity & Integration

• 4–20 mA analog outputs
• Modbus TCP/RTU communication
• Ethernet/LAN connectivity
• Optional wireless data logging

🛡 Robust Field Design

• Industrial enclosures with IP ratings suitable for plant environments
• Temperature compensation and sensor protection
• Easy maintenance with replaceable sensing modules

📌 Application Areas

🏭 Industrial Combustion Optimization – Boilers, furnaces, kilns
⚙️ Emission Compliance Monitoring – CEMS and periodic checks
🔥 HVAC & Facility Management – Fuel-air ratio testing