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Raytek® Raynger® 3i Plus

Handheld infrared thermometer for hot environments

 Infrarot-Thermometer Raytek Raynger 3i Plus
 Raytek Raynger 3i Plus mit Zielfernrohr
 Raytek Raynger 3i Plus
 Raynger 3i Plus Softwarebild
 Infrarot-Thermometer Raytek Raynger 3i Plus
The new Raynger® 3i Plus handheld IR thermometer for hot environments!
 Raytek Raynger 3i Plus mit Zielfernrohr
 Raytek Raynger 3i Plus
 Raynger 3i Plus Softwarebild

Stronger, safer, smarter and handy pyrometer

  • Ensure operator safety and efficiency with 'Red Nose' heat-resistant warning detector and alarm
  • Transfer measurement data fast and easy to PC or smartphone, using USB or Bluetooth®
  • Ensure accurate temperature readings at longer distances with high optical resolution
  • Rugged design reduces risk of damage and service costs; withstands 1m (3.2ft) drop

Raytek® Raynger® 3i Plus is designed for use in high-temperature industrial applications, 400–3000°C (752-5432°F), such as iron and steel, metal refining, foundry and processing operations, ceramics, semiconductors, chemical and petrochemical furnaces, as well as heat treatment and power plants.

  • At a Glance
  • Technical Specs
  • Applications
  • Accessories
  • Resources

The Raytek® Raynger 3i Plus high temperature handheld infrared thermometer is designed to meet process performance requirements in many industrial applications, including highly demanding hot environments in primary and secondary metal processing, as well as petrochemical and power plant operations.

The strong and rugged design of this new generation of portable pyrometers withstands a 1m (3.2ft) drop test and provides longer operational cycle for up to 24 hours when powered with rechargeable batteries.

Raynger 3i Plus laser temperature gun features intuitive user interface for easy parameter setup and enables ‘on-site’ display of data analysis and trending, as well as fast and easy data transfer to PC or smartphone using USB or Bluetooth®.

To meet the highly demanding requirements of hot industrial environments, the Raytek 3i Plus IR thermometer features high optical resolution 250:1, which ensures accurate temperature readings at longer distances. Heat resistant “Red Nose” warning detector ensures operator safety and efficiency. Dual laser and scope sighting, visible even against "red hot" backgrounds, make this IR thermometer a perfect choice for hot temperature applications.

Key Features:

  • Read temperature ranges from 400 to 3000ºC (752 to 5432ºF)
  • Ambient operating temperatures: 0 to 50ºC (32 to 120ºF)
  • Dual laser and scope sighting options for fast and simple target aiming
  • High optical resolution: 250:1 to ensure accurate temperature readings at longer distances
  • Red Dot sighting technology for accurate targeting against “red hot” backgrounds
  • "Red Nose" heat resistant warning-detector and alarm
  • Data storage: up to 4,900 units with location, date, and time stamp
  • Bluetooth® wireless technology for communication with a mobile device
  • Documenting personal computer (PC) software

Raytek DataTemp® Raynger 3i Plus Software & Mobile App

The new 3i Plus DataTemp Windows PC software supports real-time communication, data storage, graphing and analysis. This innovative portable IR thermometer includes a mobile app for quick data transfer and collaboration, as well as fast and simple on-site capture and emailing of the temperature reports. It also allows instant views of the temperature trend in real time.

Download Raynger 3i Plus Mobile App from iTunes ►

Model Number
Temperature Range
700 to 3000 ºC
(1292 to 5432 ºF)
400 to 2000 ºC
(752 to 3632 ºF)
Spectral Response
1.0 μm
1.6 μm
System Accuracy
±0.5 % of reading +1 ºC (2ºF) for <2700 ºC (4892 ºF)
± 2% of reading for >2700°C (4892°F)
±0.3 % of reading ±1 ºC (2ºF)
Response Time
40 mSec
Optical Resolution (D:S)
0.10 - 1.00
Operating Temperature
0 to 50 ºC (32 to 120 ºF)
Storage Temperature
-20 to 60 ºC (-4 to 140 ºF) without batteries
Relative Humidity
10 to 90 %, RH noncondensing @ 30 ºC (86 ºF)
Dimensions /Weight
Laser Models: 218 x 172 x 74 mm/700 g
(8.5 x 6.7 x 2.9 in /1.5 lb)
Scope Models: 218 x 222 x 74 mm/950 g
(8.5 x 8.7 x 2.9 in /2.0 lb)
Single cell Lithium-ion, 3.6 V, 2500 mAh or via USB 2.0
Battery Life (Lithion-Ion)
24 hours
Laser beam for targeting (On/Off) (EN60825 Class 2, FDA Class II)
Temperature Display
ºC or ºF (selectable)
Signal Processing
MAX, MIN, DIF, AVG Temperatures
Audible Alarms
Target temperature/Ambient temperature/Low battery
Data Logging
Up to 4,900 data points
Digital Outputs
USB 2.0, optional Bluetooth® 4.0** (USA/Canada: Bluetooth and USB standard)
Additional features
Backlit LCD, Locking Trigger, Tripod Mounting, Reflected Energy Compensation


Standards and Compliance

WEEE Directive (2002/96/EC) With reference to the equipment types in the WEEE Directive Annex I, this product is classed as Category 9 "Monitoring and Control Instrumentation." Do not dispose of this product as unsorted municipal waste.
RoHS Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment
CE Conforms to European Union directive.
CMC Conforms to China Metrology Certification CMC mark with Implement standard Q/SXAV 16
CSA Conforms to Canadian Standards Association Certification.
FCC Class A digital device: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
BC Conforms to the Appliance Efficiency Regulation (California Code of Regulations, Title 20, Sections 1601 through 1608) for small battery charging systems
KCC Electromagnetic Compatibility applies to use in Korea. This product meets requirements for industrial (Class A) electromagnetic wave equipment.

Raytek® Raynger 3i Plus are portable IR thermometers designed for high temperature applications. They cover a temperature range of 400 - 3000 ºC (752 - 5432 ºF) (depending on the model). Superior Distance-to-Spot (D:S) ratio allows users to measure high temperature targets from longer distances, ensuring accurate temperature readings and operator safety.

Click here if you would like to speak with an expert to discuss your application

Each Raytek Raynger 3i Plus model comes with the list of accessories listed below:

  • Carrying case
  • CD with software for real-time graphic temperature display and data download, and operator's manual (PDF format)
  • Lithium-ion battery, 2.5 Ah
  • Mini USB port adapter (100 – 240 VAC 50/60 Hz)
  • Mini USB-to-DC jack converter for charging battery separately
  • Computer cable with USB-to-Mini USB, 1.5 m (4.9 ft)
Product Literature: 
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