Everest Interscience of Tucson, Arizona, has
released their design of a Micro-Miniature Infrared Thermometer System – the
Model 3800 Series. This is a new
precision infrared temperature measurement system housed in a stainless steel
case that is only 5/8” in diameter and 2-1/4” long, about the size of a man’s
thumb. There is no need for a remote transmitter to perform the linearization
and signal conditioning. The electronics are all included in the miniature
3800 comes in both a high-temperature formation (Model
3800H) and a low-temperature formation (Model
3800L). The temperature range for the Model 3800ZH is -40°C to 1100°C or
-40°F to 2000°F. The temperature range for the low-temperature Model 3800ZL
sensors is -40°C to 100°C or -40°F to 200°F. They have 1.0°C or 1.0°F and 0.1°C
or 0.1°F, respectively. The accuracy for the Model 3800ZH is ±1% for Reading
±1° and ±0.5°C or ±0.5F for the low-temperature Model 3800ZL.
optical configuration is robust, aerospace-quality, double-coated Zinc Selenide
Optics per Military Specification MIL-C-13508. They operate in the 8 <
Wavelengths < 14 Microns spectral pass band. The standard field of view for the
high-temperature infrared temperature sensor is 2° or 15° and 4° or 15° for the
low-temperature. And, they can measure target sizes from one-half millimeter.
output for the Model 3800’s is 4-20 Milliamp (mA). They have a single-wire,
loop-powered interface. Both the power and the signal can be carried on one
conductor strand. This makes it impossible to “fry” the instrument by
installing it incorrectly. And, optional outputs of 0-5 Volt, Millivolt (mV)
(1.0mV/°C for the high-temperature and 10 mV/°C for the low-temperature) and
Type J or K Thermocouple are available.
feature of the infrared sensor is that they are 100% field interchangeable.
They can be switched out in the field with no need for recalibration. Also, it
is possible to do field calibration and Emissivity adjustment.
micro-miniature infrared temperature sensors can be fitted onto existing
machinery and run continuously to monitor the temperature of operations where
maintaining a certain temperature is of extreme importance. The size makes them
compact and easy to use.
Interscience has a complete line of both hand-held and fixed-mounted infrared
thermometers and temperature sensors in their product line. Also, Everest
manufactures a portable calibration source (Model
1000) that can be used to accurately verify the accuracy of any infrared
thermometer. All of these instruments can be view at the Everest website at