HL Laser Series – Laser-Aiming Infrared Thermometer
Laser-sighted infrared thermometers with LCD and on-site settings, 4–20 mA output, covering −40 °C to 2600 °C across LT, IE, IN and SI versions.
A Class 2 laser marks the measuring spot for small targets that need precise aiming. Coding-list SKUs use 4–20 mA output and a 5 m cable; emissivity and signal processing can be set on the sensor.
See exactly where you measure
Laser aiming
Class 2 laser marks the spot; dual-laser on LT coding SKUs; adjustable focus on IE / IN / SI.
LCD and on-site settings
Set emissivity and signal-processing functions on the sensor.
Four spectral versions
8–14 µm (LT), 2.6 µm (IE), 1.6 µm (IN) and 1 µm (SI).
Rugged stainless housing
IP65 (NEMA-4), M45×1.5 mounting thread.
Wide supply range
8–36 VDC; 4–20 mA output; RS485 with an optional cable.
Industrial cable length
5 m cable on standard coding SKUs.
Models and parameters
Four spectral versions from the current coding list, each with two or more ranges.
| Model | LT | IE | IN | SI |
|---|---|---|---|---|
| Spectral range | 8–14 µm | 2.6 µm | 1.6 µm | 1 µm |
| Temperature range (°C) | −40–600 −25–800 | 50–500 80–800 150–1100 | 200–800 240–1400 300–1800 500–2500 | 600–2000 700–2600 |
| Aiming / focus | Dual laser, fixed focus | Laser, adjustable focus | Laser, adjustable focus | Laser, adjustable focus |
| Output | 4–20 mA | 4–20 mA | 4–20 mA | 4–20 mA |
| Cable | 5 m standard (coding SKUs) | 5 m standard (coding SKUs) | 5 m standard (coding SKUs) | 5 m standard (coding SKUs) |
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Ranges and output from the current standard coding list. Dual-laser LT and laser adjustable-focus IE / IN / SI as described there. Optical ratios and accuracy below are from the HL series manuals where consistent.
Measurement
| Distance-to-spot (typical) | About 70:1 (LT) up to about 200:1 (selected IN / SI) — confirm per SKU |
|---|---|
| Response time (typical) | 100 ms (LT); 10 ms (IE / IN / SI) |
| System accuracy (typical) | ±1% or ±2 °C class (see manual for model limits) |
| Emissivity | 0.100–1.099, set with the button |
| Laser | Class 2 aiming laser; auto-off after about 5 min |
| Display | LCD on the sensor |
Electrical
| Power supply | 8–36 VDC |
|---|---|
| Analog output | 4–20 mA |
| Digital | RS485 with optional communication cable |
| Out-of-range signal | Below range: display ---L, output < 3.8 mA · above range: display ---H, output 21–23 mA |
Environment & mechanics
| Environmental rating | IP65 (NEMA-4) |
|---|---|
| Ambient operating temp. | 0–60 °C |
| Storage temperature | −20–85 °C |
| Relative humidity | 10–95%, non-condensing |
| Housing | Stainless steel; M45×1.5 mounting thread |
| Weight | ≈ 390 g |
Dimension drawing
Cable and wiring
Standard cable, 5-pin
| Pin | Wire color | Function |
|---|---|---|
| 1 | Blue | Output − |
| 2 | Yellow | Output + |
| 3 | — | Laser external trigger |
| 4 | Red | Power + |
| 5 | Black | Power − |
| Shell | Clear | Shield |
Options
- Laser external-trigger cable (custom)
- RS485 communication cable (custom)
- Close-focus lenses on selected LT optics
Where HL thermometers are used
Small targets
Small targets that need precise spot measurement, and targets that are difficult to reach or moving.
Process industries
Printing, paper making, laminating, drying, food processing, textiles and pharmaceuticals.
Metals, kilns & glass
Metallurgy, kilns, flat glass, refractory materials and heating furnaces.
Frequently asked questions
How does the laser aiming work?
How do I focus IE, IN and SI?
What does the output do when the temperature is out of range?
How large does my target have to be?
What is in the box
- HL sensor
- Mounting nuts and bracket
- Cable (5 m on coding SKUs)
Optional accessories
- Laser external-trigger cable (custom)
- RS485 communication cable (custom)
- Close-focus lenses (selected LT optics)
Need help choosing the right range or optics?
Tell us your application and we will reply within one business day. OEM and custom versions are available — see OEM & Custom.