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RTD Sensors, Class A, B, C, RTDs Pt100, Pt1000 100 Ohms, 1000 Ohms, Melt Bolt,
Pencil Probes, Rtd Plug, with Head Mount, Stainless Steel Compression Fittings,
Brass Fittings, Bushing, Spring Loaded Probes, Thermowell, Magnetic Helddown,
Replacement Probes | | | | | | | | | | |      |
 |  |  |  | | | | | | | | | | Heavy
Duty Probe | Extension
Armored | Standard
Probe |
NPT Hex Bushing armor | | | | | | | | |
 |  | | | | | |  |  | | | | | | | | | | Alumina
Ceramic Terminal |
Pipe Clamp Sensor | Reduced
Tip | With
Compression fitting | | | | | | | | | |  |  |  |  | | | Washer
Flange | | | | | | | Alumina
Ceramic Terminal | Air
sensing Probe | Spring
loaded Cap, Ring Terminal | | | | | | | | | |  |  |  |  | | |
With NPT Compression |
With heavy duty NPT Compression | Adjustable
Flange | Magnetic
Helddown | | | | | | | | | |  |  |  | | Spring
Loaded Cap | Replacement
Probes |
Industrial Head Pt RTD | | | | | | | | | |  |  | |  | | | Stepped,
Straight, Tapered, Socket Weld, Weld-in, VanStone, flanged, Limited Space, Sanitary Contact
us for Thermowell Probe Assemblies | | | Penetration
| 200°C
Tape Patch Platinum Thin Film RTD | | | | | | | | | | | | | |  |  | | | RTD
Accessories, Components, Chips | RTD
wires, control and instrumentation wires | | | | | RTD
chips ( Platinum Thin Film Elements ) are manufactured from metals whose resistance
increases with temperature. Within a limited temperature range, the resistivity
increases linearly with temperature. This resistance is directly proportional
to a metal wire's length, and inversely proportional to the cross-sectional area.
The element is coated with ceramic that can withstand high temperature. Some Rtd
are wire wounded with ceramic casing. The
chemical stability, availability in pure form, and highly reproducible electrical
properties, has made Platinum the metal of choice for RTD's which are made of
either IEC/DIN-grade platinum or reference-grade platinum. The difference lies
in the purity of the platinum. The IEC/DIN standard is pure platinum that is intentionally
contaminated with other platinum. To measure
the resistance of an RTD, a small electric current (about 1 mA) must flow through
the sensor to create the necessary voltage drop. The current causes the platinum
element in the RTD to heat up above the temperature of the RTD's environment.
The heating is proportional to the electric power (P=I sq. R) in the RTD and the
heat transfer between the RTD sensing element and the RTD environment. If the
RTD is in a poor heat transfer medium (e.g., air), it will heat up more than if
it is in a fluid, such as water. The electrical current will heat the sensor and
may influence the measurement. Tolerances for
RTD's should meet the standards of ASTM E1137 Grade A or B and IEC 751 Class A
or B. | | | | | | | | | | |
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