Online Infrared Thermometer IRVLT L / M / H Series

IRVLT L / M / H Series

The IRVLT L/M/H is a high ambient infrared thermometer with a separate sensing head that withstands 70°C, 120°C or 180°C ambient without cooling. Its long-wave head gives non-contact, wide-range measurement from (-)40°C to 900°C, so the small head sits in warm locations for continuous monitoring while electronics stay cool.

Heads rated 70 / 120 / 180°C
Wide −40 to 900°C range
Non-contact continuous monitoring
Long-wave separate head
IP65 protection

Temperature range review

Head ambient selection

Spot size check

Cable length guidance

Commissioning support

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High ambient infrared thermometer with separate miniature sensing head
Precise non-contact, wide temperature range (-)40°C…600°C, up to 900°C (LTH)
Three sensing-head variants withstanding 70°C / 120°C / 180°C ambient without cooling
Long-wave 8–14 µm spectral response
4–20 mA current analog output and RS485 digital communication
Easily accessible programming keys and backlit LCD display
Adjustable emissivity and transmissivity
Average, peak hold and valley hold functions
6-digit backlit LCD display
IP65 protection grade
Teflon cable (withstands 200°C) between sensing head and electronics box
Optional air purge collar, air cooling jacket and dual laser sighting tool

Low and medium temperature process measurement
Hot or tight mounting points needing a remote head
Drying, curing and heating processes
Plastic, paper and packaging machinery
Food and process line monitoring
Heat treatment and oven monitoring
Targets requiring a remote display location
Continuous process temperature control
Warm-ambient sensing-head locations up to 180°C
Quality control across a wide temperature band

Model: IRVLT L / M / H Series (LTL / LTM / LTH)
Product Type: Online Infrared Thermometer with Separate Miniature Sensing Head
Temperature Range: LTL 0°C–500°C; LTM (-)40°C–600°C; LTH 0°C–900°C
Accuracy: ±1.5% of reading or ±1.5°C, whichever is greater (at 23°C ±5°C, emissivity 0.95)
Repeatability: ±0.5% of reading or ±1°C, whichever is greater
Spectral Response: 8–14 µm
Optical Resolution: 15:1 (LTL also 2:1); LTH 15:1
Response Time: 300 ms
Emissivity: 0.100–1.100 (adjustable), default 0.950
Transmissivity: 0.100–1.000 (adjustable), default 1.000
Average / Peak / Valley Hold Time: 0.1–60 seconds
Display: 6-digit backlit LCD
Output: 4–20 mA
Digital Output: RS485 (Modbus RTU)
Power: 24VDC ±20%
Protection: IP65
Operating Temp. (Sensing Head): LTL -10°C–70°C; LTM -10°C–120°C; LTH -10°C–180°C
Operating Temp. (Electronics Box): -10°C–70°C
Standard Cable: 1 m Teflon cable (withstands 200°C) between sensing head and electronics box; 0.5 m PVC extension cable to junction box with terminals
Sensing Head Diameter: LTL 18 mm; others 14 mm
Accessories: Air purge collar; air cooling jacket with integral air purge; dual laser sighting tool

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.

Chemicals & Fertilisers

Precision solutions for chemical processes, ensuring compliance and operational efficiency.

Food & Beverage

Improving production and safety in food and beverage industries with real-time monitoring.

Pulp & Paper

Optimizing pulp and paper production with integrated solutions for quality and efficiency.

Power

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

Cement

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

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

Ensuring Environmental Compliance with CEMS: A Step Ahead

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 high ambient infrared thermometer has a sensing head that tolerates a hot surrounding environment. The IRVLT heads withstand 70°C, 120°C or 180°C ambient without cooling while measuring (-)40°C to 900°C.

LTL covers 0°C–500°C, LTM covers (-)40°C–600°C and LTH covers 0°C–900°C, with sensing heads that withstand 70°C, 120°C and 180°C ambient respectively, without cooling.

The IRVLT uses long-wave 8–14 µm heads rated for high ambient (up to 180°C) and a wide (-)40°C to 900°C range, while the IRV uses short-wave heads for higher target temperatures up to 1800°C at 70°C ambient.

A separate head lets the small sensor sit in a warm or tight location while the electronics box and display stay in a cooler, accessible area for continuous monitoring.

The IRVLT provides a 4–20 mA analog output and RS485 Modbus RTU digital communication.

Yes. Optional accessories include an air purge collar, an air cooling jacket with integral air purge and a dual laser sighting tool.

Users should check target temperature, head ambient rating, spot size at distance, cable length, mounting and output requirement.

Download Resources

Online Infrared Thermometer IRVLT L / M / H Series

IRVLT L / M / H 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

Chemicals & Fertilisers

Chemicals & Fertilisers

Food & Beverage

Food & Beverage

Pulp & Paper

Pulp & Paper

Power

Power

Cement

Cement

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 high ambient infrared thermometer?

What is the difference between LTL, LTM and LTH?

How is the IRVLT different from the IRV?

Why use a separate sensing head?

What output signals does the IRVLT provide?

Does the IRVLT support cooling and air purge?

What should users check before selecting the IRVLT?

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