HX Two-Wire Series – High-Precision Two-Wire Infrared Thermometer
Two-wire 4–20 mA infrared thermometers with distance-to-spot ratios up to 150:1, covering 0 °C to 1700 °C in standard segments.
The HX series combines non-contact temperature measurement with standard two-wire loop technology. Three wavelengths — 8–14 µm, 1.6 µm and 1 µm — cover low-temperature processes through to kilns and furnaces.
Two wires, high precision
Simple two-wire installation
4–20 mA two-wire loop, 12–24 VDC supply.
Durable sensor head
IP65 (NEMA-4) sensor head.
High distance-to-spot ratio
55:1 at 8–14 µm and 150:1 at 1.6 µm and 1 µm.
Wide temperature range
Standard segments from 0 °C to 1700 °C.
Adjustable emissivity
Emissivity adjustable on the instrument.
Three wavelengths
8–14 µm, 1.6 µm and 1 µm for low-, medium- and high-temperature targets.
Models and parameters
Three wavelengths and standard temperature ranges.
| Model | LT | IN | SI |
|---|---|---|---|
| Wavelength | 8–14 µm | 1.6 µm | 1 µm |
| Temperature range (°C) | 0–300 0–500 100–800 | 400–1200 | 700–1700 |
| Distance-to-spot ratio | 55:1 | 150:1 | 150:1 |
| Response time | 150 ms | 10 ms | 10 ms |
HX is still sold; ranges and optics below follow the series datasheet (not on the current short coding sample list). Confirm the exact SKU when ordering.
Measurement
| System accuracy | ±1% or ±2 °C, whichever is greater (ambient 23 ±5 °C) |
|---|---|
| Repeatability | ±0.5% or ±1 °C, whichever is greater (ambient 23 ±5 °C) |
| Emissivity | Adjustable (typical 0.10–1.09) |
Electrical
| Analog output | 4–20 mA, two-wire |
|---|---|
| Max. loop resistance | 750 Ω (at 24 VDC) |
| Power supply | 12–24 VDC |
Environment & mechanics
| Environmental rating | IP65 (NEMA-4) |
|---|---|
| Ambient operating temp. | 0–60 °C |
| Storage temperature | −20–80 °C |
| Relative humidity | 10–95%, non-condensing |
| Dimensions | Ø42 mm class housing; thread 1.5"-20UN-2A (see drawing) |
Dimension drawing
Where HX thermometers are used
Printing, paper & drying
Printing, paper making and drying processes.
Food, textiles & pharmaceuticals
Food processing, textiles and pharmaceuticals.
Metals, glass, ceramics & kilns
Metallurgy, ceramics, flat glass, refractory materials and kilns.
Frequently asked questions
How is the HX connected?
Which wavelength should I choose?
How large does my target have to be?
What is in the box
- HX sensor
- Mounting hardware
Optional accessories
- Mounting bracket
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.