UNO | Stand Alone 4…20mA

Land Instruments UNO - Fixed ThermometerUNO thermometers for Process Monitoring and Control Applications. A range of stand alone thermometers answering the needs of OEM’s, plant designers and process operators for a rugged, low cost temperature sensor which will integrate directly into a 4 to 20mA measuring, monitoring or control loop.

Key Features & Benefits

  • Range of standard through-the-lens sighting thermometers.
  • Range of fibroptic thermometers with optional laser targeting system.
  • Comprehensive range of thermometer mountings and accessories for complete environmental protection.
  • DIN-rail mounted power supply unit – DPU (optional).
  • LANDMARK Indicator LMi – digital panel meter (optional).

The UNO range of thermometers is designed to satisfy all OEM requirements and has a wide selection of infrared radiation thermometers available.
Each series of thermometers offers a choice of built-in time functions – peak picker or averager; and a range of temperature spans and operating wavebands to ensure optimum accuracy of measurement for the chosen industry and application.
The standard range of UNO thermometers feature precision through-the-lens sighting with focusable optics, which guarantees exact viewing and measurement of the smallest of target areas.
Adjustable emissivity/non-greyness compensation, peak picker and averager time functions are built-in as standard.
The UNO thermometer provides a 4 to 20 mA linear output. Thermometer type, temperature range, spectral response and optical characteristics are chosen to suit the particular application.

UNO Radiation Thermometers

The UNO thermometers utilize proven reliable electronics combined with a high quality optical system to provide accurate, dependable temperature measurement.
They are housed in a rugged die cast body with a high quality electrical connector to provide reliable performance.
The single wavelength and ratio thermometers all feature throughthe-lens sighting with a 6° field of view. Adjustable focus with a circular graticule gives precise alignment on to the smallest of targets.
Two optical variants are available: Standard and Short-focus. Close focus lenses are also available permitting measurement of targets as small as 0.45mm/0.017in. Ask for separate leaflet for full information.

UNO Fibroptic Thermometers

Fibroptic thermometers utilize a flexible fibre optics light guide enabling the detector and electronics enclosure to be located in a less hostile environment. The fibroptic thermometers are available with an optional built-in laser targeting system which defines the target spot for accurate sighting.
The use of fibre optics permits viewing of normally inaccessible targets, where there are high magnetic fields or in high ambient temperatures up to 200°C/400°F without cooling of the optic head. There is a choice of three optic heads and three light guide lengths.Peak Picker
The peak picker function is used when measuring the temperature of intermittent targets or where the hot target surface is obscured by cool areas such as scale on rolled steel.  The peak picker decay rate is adjustable from 1.5 to 30% of span per second.
The peak picker function can be reset from a remote switch connected to the DPU.

Averager

The averager function is used to smooth unwanted variations or rapidly fluctuating changes in the thermometer signal to maintain a valid temperature reading. The averager time constant can be adjusted from 5ms (U1 and U2 thermometers) to 5 seconds to give a smooth temperature display.

Technical Details UNO Standard Thermometers

Model Temp. Range Waveband FOV Min Target Dia*
(Standard)
Min Target Dia**
(with close-up lens)
U1 600/1600C 600 to 1600°C 1.0µm 100:1 3.5mm 0.9mm
U1 800/2600C 800 to 2600°C 1.0µm 200:1 1.8mm 0.45mm
U2 300/1100C 300 to 1100°C 1.6µm 100:1 3.5mm 0.9mm
U4 50/250C 50 to 250°C 2.4µm 30:1 11.7mm 3.2mm
U4 150/550C 150 to 550°C 2.4µm 100:1 3.5mm 1.0mm
U5 400/1300C 400 to 1300°C 4.8 to 5.2µm 100:1 3.5mm 1.0mm
U5 1000/2500C 1000 to 2500 °C 4.8 to 5.2µm 100:1 3.5mm 1.0mm
V1 600/1600C 600 to 1600°C 0.85 to 1.1µm 50:1 7.0mm 1.8mm
V1 1000/2600C 1000 to 2600°C 0.85 to 1.1µm 200:1 1.8mm 0.45mm
* Standard variable and short focus versions available.
** Choice of close-up lenses available.


Technical Details UNO Fibroptic Thermometers

Model Temp. Range Waveband FOV LENS Min Target Dia*
(Standard)
U1 600/1600CL
U1 600/1600CYL
600 to 1600°C 1.0µm 25:1 A10
A25
A50
4mm/0.15in
10mm/0.39in
23mm/0.90in
U1 800/2600CL
U1 800/2600CYL
800 to 2600°C 1.0µm 75:1 A10
A25
A50
1.3mm/0.05in
3.3mm/0.12in
6.7mm/0.26in
U2 300/1100CL
U2 300/1100CYL
300 to 1100°C 1.6µm 25:1 A10
A25
A50
4mm/0.15in
10mm/0.39in
23mm/0.90in
V1 600/1600CL
V1 600/1600CYL
600 to 1600°C 0.85 to 1.1µm 25:1 A10
A25
A50
4mm/0.15in
10mm/0.39in
23mm/0.90in
V1 1000/2600CL
V1 1000/2600CYL
1000 to 2600°C 0.85 to 1.1µm 75:1 A10
A25
A50
1.3mm/0.05in
3.3mm/0.12in
6.7mm/0.26in

Y Denotes laser targeting system fitted.

More Information UNO

UNO Stand Alone – Datasheet

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