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Precon
manufactures interchangeable NTC thermistors with a wide variety of resistance
curves. We also provide RTDs and thermocouples for those
applications where they are the best choice. Below you will
find detailed information about these types of temperature
sensors. Note that any of these devices can be used in any
of our standard probe housings or in your custom probe design.
NTC Thermistors
Precon manufactures Negative Temperature Coefficient (NTC)
thermistors for use in a wide variety of applications. The
resistance of NTC thermistors, which decreases as temperature
increases, changes 4-6% for each degree in temperature change,
making them an excellent choice for high accuracy applications and
where the signal must travel long distances. Thermistors
offer very fast response times, and are also small, rugged and
interchangeable in the field.
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Bare Bead
Bare bead or coated chip thermistors are the most commonly
used type of NTC thermistor. They are typically placed into
a probe or well and sealed in place with an epoxy or similar
material. Epoxy coated chip thermistors can be trimmed
to the tight accuracy requirements needed for interchangeable
thermistors.
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Precon Thermistor Specifications |
|
R25 (Ohms) |
Type |
Accuracy* |
|
2,252 |
II |
+/- 0.36
oF |
|
3,000 |
II |
+/- 0.36
oF |
|
10,000 |
II |
+/- 0.36
oF |
|
100,000 |
II |
+/- 0.36
oF |
|
10,000 |
III |
+/- 0.36
oF |
|
20,000 |
IV |
+/- 0.36
oF |
|
* Over the range of 0 -
70
oC
(32 - 158
oF) |
Link to data Sheets
(coming soon!) |
Purchase Now!
(click here)
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Glass Bead
Glass bead thermistors are made by encapsulating a bare bead
thermistor with silicon-based glass, which provides
exceptional protection in harsh environments. Glass bead
thermistors are typically available in 1%, 2%, 3%, 5%, and 10%
accuracy levels.
NOTE: Precon uses glass bead thermistors from other
manufacturers in its temperature probe products. |
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RTDs
RTDs or Resistive
Temperature Detectors, are ceramic devices with a thin
layer of metal, typically platinum, deposited on one side.
They offer the advantage of producing a linear electrical
output, which provides for simple signal processing.
Although they do not provide as large a signal as
thermistors, they are often recommended where accuracy is
required over a wide temperature range.
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RTD Sensor Specifications |
|
R25 (Ohms) |
Type |
Accuracy |
TCR |
|
100 |
81 |
+/- 0.1% |
0.00385 |
|
1,000 |
85 |
+/- 0.1% |
0.00385 |
|
1,000 |
91 |
+/- 0.1% |
0.00375 |
|
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Link to RTD Resistance
Temperature Table |
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Thermocouples
Thermocouples consist of two wires of different metals
that, when combined, will produce a small voltage when
there is a difference in temperature between the device
and a reference junction. Thermocouples are useful
when a wide temperature range is expected.
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PRECON can design and manufacture custom
temperature and humidity products for the most demanding
applications.
Precon’s package
includes:
Low
Cost OEM supplier
Standard and custom products
Fast response time
Volume production capability
35 years of manufacturing experience
Made in the USA
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Applications |
- Food Processing Equipment
- Pool and Spa Systems
- Industrial Process Control
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- Remote System Monitoring
- Semiconductor Fabrication
- Commercial Equipment
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