Specifications

Temperature
About Temperature
Measurement
Probe Sheath Materials
INCONEL® 600 Sheath is ideal for severely corrosive environments
and at elevated temperatures. It resists progressive oxidation.
Maximum operating temperatures are: continuous – 1149 °C,
intermittent –1371 °C.
304 SS Sheath is for general purpose use. It is corrosion-resistant, and is
good for food service and biological applications. Maximum operating
temperatures: continuous – 899 °C, intermittent – 1399 °C.
316 SS Sheath has higher corrosion resistance than 304 SS. It withstands
some strong acids. Maximum operating temperatures: continuous –
899 °C, intermittent – 1371 °C.
SS Sheath with Coating of HDPE with grounded junction is ideal with
corrosive liquids and atmospheres. It has a longer response time and
can measure temperatures to 260 °C.
Eutech oers various probes with ungrounded junction and 304
SS sheath. Models include the Type J and Type K probes available
for general purpose immersions in liquids or penetration in meats,
plastic and other semi-soft materials.
What is a Thermistor?
Thermistors are thermally sensitive resistors which change electrical
resistance due to temperature changes. They have predictable
characteristics and offer long term stability. Although response times are
generally faster than other types of probes, thermistors have a limited
temperature range that usually cannot exceed 150 °C.
The Eutech EcoScan Temp 5 has a measurement range of 40.0 to
125.0 ºC using the 100K thermistor temperature probe.
What is RTD?
RTD or Resistance Temperature Detector refers to the measurement of
temperature by measuring the change in electrical resistance across
metal wires. This resistance value is interpreted by an RTD thermometer.
Although the RTD wire can be made of any metal, platinum is preferred
for its excellent repeatability, stability and resistance to corrosion and
chemicals. RTDs are more accurate and stable compared to other
probes such as thermocouples. However they are not recommended
for extreme temperatures. An RTD probe is chosen where accuracy and
repeatability are important.
The Eutech EcoScan Temp 6 is a RTD temperature meter which
can be used with the 3-wire RTD Pt 100 temperature probe for
accurate and reliable measurements.
Exposed Junction has the fastest response time
making it ideal for measuring rapid temperature
changes. Clear coating on most models provides
a humidity barrier for the thermocouple. However,
it is not recommended for use with corrosive
fluids or atmospheres.
Ungrounded Junction has a welded junction
insulated from the protective sheath and is
electrically isolated. Longer response time is
expected. Recommended use for conductive
solutions or where isolation of the measuring
circuitry is required.
Grounded Junction has a junction welded to
tip of sheath. Wires are completely sealed from
contaminants. Good response time.
Introduction to Thermometry
Thermometry is the measurement of temperature or temperature
changes. Temperature measurements are necessary in various industries
ranging from agriculture, HVAC, chemical and manufacturing, food and
beverage, boiler and cooling towers, schools and laboratories to water
and wastewater treatment. There are various types of thermometers
that rely on different principles of measurement.
Eutech offers the user-friendly and feature-packed EcoScan
temperature meters Temp 5, Temp 6 and Temp JKT for routine
indoor and outdoor temperature measurements. The EcoScan
Temp 5 and Temp 6 are paired with the 100K thermistor
temperature probe and 3-wire RTD Pt 100 temperature
probe respectively.
What is a Thermocouple?
Thermocouple probes are composed of two dissimilar metals,
joined to produce a voltage at a given temperature. Thermocouple
thermometers measure, amplify, linearise and display the proportional
voltage signal generated by the thermocouple probe. Thermocouples
are used in most general purpose applications where precision is not a
top priority. They offer a wide temperature range and come in a variety
of metal combinations or calibrations.
The J, K and T are three of the most common calibrations available.
Although the maximum temperature differs with the diameter of the
wire used in the thermocouple, each calibration consists of a different
temperature range and environment.
Type J and K Probes:
±1 to 4 °C or ±0.4 % probes of reading above 0 °C, whichever is
greater
Type T Probes:
±0.5 to 2 °C or 0.4 % of reading above 0 °C, whichever is greater
Thermocouple Selection
Some of the following criteria determine the selection of a suitable
thermocouple:
•Temperaturerange
•Chemicalresistanceofthethermocoupleorsheathmaterial
•Abrasionandvibrationresistance
•Installationrequirements(mayneedtobecompatiblewithexisting
equipment; existing holes may determine probe diameter)
The EcoScan Temp JKT is designed for measurement with the Type J,
Type K and Type T thermocouples. The meter is capable of measuring a
wide range of temperatures and is rugged, dust-proof and splash-proof
to IP54 standards, making it suitable for most industrial applications.
Thermocouple Probe Junction Types
Sheaths with small diameters have faster response times. Sheaths
with larger diameters have longer life and are better for measuring
higher temperatures.
About Temperature Measurement
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Temperature