High Temperature Handheld Infrared Thermometer – Raytek Raynger 3i Plus Series


  • Rugged design reduces risk of damage and minimizes service costs – withstands 1m (3.2ft) drop
  • More data sampling, ensuring faster processing time
  • Longer operational cycle (24 h) – Rechargeable batteries
  • Flexible for wide range of applications/temperatures
  • Highly accurate temperature measurement
  • High optical resolution ensures accurate temperature readings at longer distances
  • “Red Nose” heat resistant warning-detector and alarm ensures operator safety and efficiency
  • Dual laser and scope sighting, even against “red hot” backgrounds
  • Intuitive user interface for easy parameter set-up, enabling ‘on-site’ display of data analysis and trending.
  • Dual laser for fast and simple aiming at the measurement target
  • Fast and easy data transfer to PC or smartphone, using USB or Bluetooth® (with Bluetooth versions)

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 features intuitive user interface for easy parameter set-up 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 temperatures applications.


  • Iron
  • Steel
  • Metal Refining
  • Foundry and Processing Operations
  • Ceramics
  • Semiconductor
  • Chemical Furnaces
  • Petrochemical Furnaces

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


Model 1M 2M
Temperature Range 700 to 3000 ºC (1292 to 5432 ºF) 400 to 2000 ºC (752 to 3632 ºF)
Accuracy ±(0.5% of reading +1ºC) (<2700ºC/4892ºF)
Repeatability ±(0.3% or reading ±1ºC
Exposure Time 40 mSec
Spectral Response 1.0 µm 1.6 µm
Emissivity* 0.10~1.00
Operating Temperature  0 to 50ºC (32 to 120ºF)
Relative Humidity 10 to 90%, RH noncondensing @ 30ºC (86ºF)
Storage Temperature -20 to 60ºC (-4 to 140ºF) without batteries
Dimensions (H x L x W) /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)
Power Single cell Lithium-ion, 3.6 V, 2500 mAh or via USB 2.0
Battery Life (Lithion-Ion) 24 hours
Laser Laser beam for targeting (On/Off)
Reflected Energy Compensation
Distance to Spot (D:S) 250:1
MAX, MIN, DIF, AVG Temperatures
Backlit LCD
Temperature Display ºC or ºF (selectable)
Display Resolution Below 1000ºC: 0.1ºC
Locking Trigger
Tripod Mounting
Audible Alarms Target temperature/Ambient temperature/Low battery
Digital Outputs USB 2.0, optional Bluetooth 4.0** (USA/Canada: Bluetooth and USB standard)
Data Logging Up to 4,900 data points
Spare Accessories Carrying case • Neck Strap • Spare Lithium-ion rechareable battery, 2.5 Ah •
Mini USB port adaptor with multi-country power plug (100–240 VAC, 50/60 Hz)
including SAA, EU, UK, US and CCC • Mini USB-to-DC jack converter for charging
battery separately • Computer cable with USB-to-Mini USB, 1.5 m (4.9 ft)


Raytek Raynger 3i Plus Series High Temperature Handheld Infrared Thermomete-DpstarGroup