PRT-5 infrared thermometer ir sensor for ocean water temperature measurement

Classification - temperature measurement, ocean, water, sea surface, earth, infrared thermometer sensor.

The Model PRT-5 infrared thermometer temperature sensor is a battery-powered, infrared sensor. Extremely versatile, this instrument makes highly sensitive, non-contact ir temperature measurements in any selected range between -50°C and 150°C with an accuracy of ±0.5°C.

The PRT-5 can be employed from aircraft, land vehicles, ships or other platforms. It is completely portable, requires no set-up time, and does not depend upon external power.

Typical targets for the PRT-5 are sea surface, ocean, water, clouds, sky background, terrain and similar large-area subjects that are difficult or impossible to measure by conventional methods.

The PRT-5 consists of a 3.5 pound optical head and a rack-mounted, solid-state electronic control unit. The optical head may be hand-held, by means of a pistol grip attachment, or tripod mounted. It is linked to the electronic control unit by an 8-foot interconnecting cable. When not in use, the optical head is stored in a rugged, protective carrying case, which also contains the control unit and all cables.

The standard PRT-5 has a 2-degree field of view, a spectral range of 8 to 14 microns (consult factory for additional spectral ranges between 2 to 20 microns), and a three-range, overlapping temperature scale graduated in degrees C or F which covers:

This instrument provides a target spot size of 35 feet at typical working distance of 1,000 feet. With all versions of the PRT-5, measurements are independent of distance as long as the target fills the instrument’s field of view.

• Sea Surface Temperature Studies
• Ocean Water Temperature Measurement
• Thermal Mapping of Ground Targets
• Pollution Site Location
• Earth Temperature ground truth studies
• Airborne Scanner Calibration
• Cloud Temperature Measurement
• Water Evaporation Studies
• Air Temperature Measurement
• Thermal Studies of Agricultural Areas
• Forest Fire Detection

The PRT-5 utilizes a high-performance, immersed thermistor detector located in its optical head to sense target temperature measurement. Because of the sensitivity of this infrared radiation detector, the PRT-5 can sense infrared thermal radiation differences as small as 0.1° C over its entire temperature measurement range. Absolute system accuracy of ±0.5° C is achieved by precisely controlling (to within 0.1° C) the temperature of a heated, in-line reference cavity within the PRT-5’s optical head. This cavity is closed at one end by the infrared detector and sealed at the other by the spectral module. A rotating chopper outside the cavity interrupts the incoming radiation and allows the detector to “see” alternately, the incoming radiation and the known, reflected radiation, from the internal reference cavity. The difference between known and incoming radiation is converted by the detector into an electrical signal related to target temperature. This electrical signal is displayed on a panel readout located on the electronic control unit. Signal display may be in degrees Centigrade, Fahrenheit, or in the corresponding value of target radiance or irradiance, as specified. High and low level electrical outputs are available on the PRT-5’s electronic unit. These signals can be used to drive two recorders simultaneously.

The PRT-5 infrared thermometer sensor also offers three selectable response times (bandwidths) —5 msec. (30 Hz), 50 msec. (3.0 Hz), and 500 msec. (0.3 Hz). Power for the PRT-5 is supplied by rechargeable, nickel-cadmium batteries. Charging is from a built-in converter which can be operated from any 115 or 230 volt a.c. source (50 to 400 Hz). A panel meter on the PRT-5’s electronic unit displays the charge state of the batteries, and, as a second function, also indicates when the internal reference cavity is up to temperature for normal operation. For high reliability, the PRT-5’s design and construction are compatible with MIL environmental specifications for airborne electronic equipment.

Unless otherwise noted, all versions of the PRT-5 infrared thermometer temperature sensor can be equipped with the following, off-the-shelf accessories which extend their usefulness:
• Sealed Optical Head

Both standard and wide-field PRT-5s are available with sealed optical heads, which permit instrument operation at high altitudes, in adverse weather, or under vacuum conditions (10-3 torr).
• Custom Length Cables
• Continuous AC Line Power Supply
• Linearized Recorder Output
• Tripod (Model TR-8B)
• 6X Sighting Telescope (2° F.O.V.)
• Precision Laboratory Calibrator
• Precision Airborne Calibration System

Good performance and reliability are what you expect when you buy precision products from The Pyrometer Instrument Company, Inc.. The PRT-5 infrared thermometer temperature sensor comes complete with a one year factory warranty. For complete details visit our Product Warranty Page.