Online Infrared Thermometer IRQ Series

IRQ Series

The IRQ Series is a two color infrared thermometer that measures temperature from the ratio of energy at two wavelengths. This gives accurate non-contact readings from 200°C to 3000°C even when dust, smoke or steam partly blocks the view, or emissivity changes, supporting continuous monitoring of demanding targets.

Two-color ratio measurement
Reads through dust, smoke, steam
Non-contact continuous monitoring
Up to 300:1 D:S ratio
Emissivity-independent reading

Temperature range review

Wavelength selection

Spot size check

Sighting option guidance

Commissioning support

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https://tipl.com/wp-content/uploads/2026/03/IRQ.pdf

Two color (ratio) infrared thermometer with anti-smoke and anti-steam optics
Accurate readings without the influence of emissivity variations and window absorption
Works when the field of view is partly blocked by dust, smoke or steam
Works when the target is smaller than the field of view
Visual sighting with variable focus optics; laser and video sighting options
Non-contact, continuous measurement with strong EMI resistance
High D:S ratio options of 120:1, 180:1 and 300:1
Slope (2-colour mode) 0.800–1.200 and emissivity (1-colour mode) 0.050–1.300
Real-time, maximum hold, average, trigger peak hold and trigger average hold modes
4 mA–20 mA isolated analog output and optional RS485 Modbus
NABL-accredited in-house black body furnace calibration available
Friendly front-panel interface for easy operation

High-temperature furnace and metal measurement
Dusty, smoky or steamy viewing conditions
Vacuum furnace applications
Induction heating and quenching in pipe bending
Targets smaller than the field of view
Changing-emissivity metal targets
Long-distance hot target measurement
Steel, forging and rolling process lines
Continuous high-temperature process control
Quality control in demanding viewing conditions

Model: IRQ Series
Product Type: Two Color (Ratio) Online Infrared Thermometer
Temperature Range: 200°C–3000°C (see ranges)
Absolute Accuracy: ±0.75% (optional ±0.5%) at 25°C ±4°C, emissivity = 1.0
Repeatability: ±0.2%
Display Resolution: 1°C
Output Resolution: 0.1°C
Slope (2-colour mode): 0.800–1.200 in steps of 0.001
Emissivity (1-colour mode): 0.050–1.300 in steps of 0.001
Measurement Modes: Real-time, maximum hold, average, trigger peak hold, trigger average hold
D:S Ratio: 120:1 / 180:1 / 300:1
Measuring Distance: SF 500 mm–∞; CF0 85–105 mm; CF1 125–165 mm; CF2 180–250 mm; CF3 210–300 mm; CF4 300–700 mm
Operation & Display: Three-button control (MOD ▼ ▲); 4 LED digital display, 5 LED indicators
Alarms: Over-temperature alarm and 4-20 mA output break alarm
Power Supply Voltage: DC18V–24V
Power Dissipation: 150 mA (max.)
Response Time: 50 ms (customisable to 10 ms or 1 ms)
Analog Output: 4 mA–20 mA (isolated)
Digital Output: RS485 (Modbus) optional
Storage Temperature: -40°C–80°C
Ambient Temperature: 0°C–65°C; with air/water cooling 5°C–120°C (air) / 175°C (water)
Humidity: 10–80% RH, without condensation
Size: Φ60 mm × 210 mm
Weight: 0.60 kg (without accessories)

Comprehensive Services Using This Product

From installation to ongoing support, we’re with you every step of the way.

Calibration

Precise calibration ensuring measurement accuracy and compliance.

Annual Maintenance Contract

Reliable year-round equipment care and support.

Installation & Commissioning

Seamless setup ensuring optimal system performance.

Industries Using This Product

Our solutions are trusted by top industries to drive growth and improve operations.

Cement

Precision measurement and control solutions for efficient cement production and quality control.

Steel

Advanced monitoring systems for efficient steel production, ensuring product consistency and safety.

Glass

Advanced instrumentation to ensure precise control and quality in glass manufacturing.

Metals

Advanced monitoring systems for efficient metal production, ensuring product consistency and safety.

Power

Optimizing power plant operations with real-time monitoring and predictive maintenance solutions.

What Customers Say About Us

Trusted Engineering Support

The team provided clear technical guidance and practical solutions. Execution was smooth and well coordinated throughout.

Mr. Vivek NairGeneral Manager – Operations, Cement Industry

Dependable Technical Partner

Their approach was systematic and aligned with our plant needs. Overall experience with product and service has been positive.

Ms. Kavita RaoSenior Manager – Maintenance, Steel Sector

Application-Focused Solutions

They understood our process conditions before recommending equipment. Support during installation was handled professionally.

Mr. Rohan MehtaProject Lead – Power Plant

Consistent Service Delivery

Product performance has been stable in regular operations. The support team responds in a timely manner.

Mr. Anil DeshmukhInstrumentation Head, Process Manufacturing

Insights & News

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Learn how Continuous Emission Monitoring Systems (CEMS) help industries stay compliant with environmental norms, providing real-time emission data, remote monitoring, and actionable insights for sustainable and responsible manufacturing.

How Predictive Maintenance is Transforming Industrial Efficiency

Discover how advanced monitoring tools like vibration and ultrasound solutions are helping industries move from reactive to predictive maintenance—reducing downtime, extending equipment life, and optimizing productivity across critical operations.

Clients Who Have Transformed Their Operations with This Product

Frequently Asked Questions About This Product

A two color infrared thermometer, also called a ratio pyrometer, measures temperature from the ratio of energy at two nearby wavelengths. This keeps readings accurate when the view is partly blocked or emissivity changes, unlike single-colour models.

A two-color sensor reads the ratio of energy at two wavelengths, so it stays accurate when dust, smoke or steam partly blocks the view, the target is small, or emissivity changes by the same factor in both bands.

The IRQ covers 200°C to 3000°C across configurable sub-ranges, depending on the selected wavelength and model.

The IRQ offers D:S ratios of 120:1, 180:1 and 300:1, which support small or distant hot target measurement.

The IRQ offers visual sighting with variable focus optics, plus laser and video sighting options.

The IRQ provides an isolated 4 mA–20 mA analog output and optional RS485 Modbus communication for continuous monitoring.

Users should check target temperature, wavelength, spot size at distance, viewing condition, sighting option, ambient temperature and output requirement.

Download Resources

Online Infrared Thermometer IRQ Series

IRQ Series

Still Confused What to Buy?

Need help deciding? Download resources to know more about the product.

Comprehensive Services Using This Product

Calibration

Annual Maintenance Contract

Installation & Commissioning

Industries Using This Product

Cement

Cement

Steel

Steel

Glass

Glass

Metals

Metals

Power

Power

What Customers Say About Us

Trusted Engineering Support

Dependable Technical Partner

Application-Focused Solutions

Consistent Service Delivery

Insights & News

Ensuring Environmental Compliance with CEMS: A Step Ahead

How Predictive Maintenance is Transforming Industrial Efficiency

Clients Who Have Transformed Their Operations with This Product

Frequently Asked Questions About This Product

What is a two color infrared thermometer?

How does two-color measurement help?

What temperature range does the IRQ support?

What D:S ratios are available?

What sighting options are available?

What output signals does the IRQ provide?

What should users check before selecting the IRQ?

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