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Operating Temperature
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The rated temperature range in which the RTD can operate. Typically, the upper and lower 5% of the operating range tends to be non-linear.
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Search Logic:
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User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
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Nominal Resistance
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The resistance of the RTD coil.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Response Time
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The response time is highly dependent on the media (air, water, oil, etc.) in which the sensor is immersed and its velocity, with no one single standard. The values given here are as specified by the suppliers. Therefore, the values should be used only as an approximate figure. Contact the supplier for details.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Sensor Types
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Your choices are...
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Standard / Class B
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The industry standard for platinum RTDs according to IEC-751 is + /- 0.12% (of resistance) at 0°C, commonly referred to as Class B accuracy. This will provide an accuracy of + /- .3°C at 0°C, which is quite good if you compare it to the + /- 2.2°C of a standard Type J or K thermocouple. These are IEC designations of accuracy. Although conforming to the use of a 0.00385 TC, the ASTM has its own designations of Grade A and Grade B that differ slightly from the IEC permissible deviations.
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Precision / Class A
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When Class B accuracy is not quite enough, the International Electrotechnical Commission (IEC) offers Class A accuracy, which permits + /- 0.15°C at 0°C and much tighter control of the Temperature Coefficient. To ensure this control, the single ice point calibration acceptable for Class B sensors will not suffice. The IEC therefore states in section 4.2.2 of Standard 751. "The test for Class A thermometers shall be carried out at two or more temperatures suitably spaced over the stated working range". These are IEC designations of accuracy. Although conforming to the use of a 0.00385 TC, the ASTM has its own designations of Grade A and Grade B that differ slightly from the IEC permissible deviations.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Sensor Technology
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Your choices are...
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Wire Wound
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A wire wound RTD is simply a coil of insulated wire wrapped around a ceramic or glass former.
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Thin Film
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Thin film RTDs are produced on ceramic substrates and are smaller than traditional wire wound RTDs.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Wire Wound Types
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Your choices are...
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Platinum
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Platinum is a bluish- white metal used in RTD elements because of its temperature linearity over a wide operating range.
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Nickel
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Nickel is a silvery white metal that is hard, malleable, ductile, somewhat ferromagnetic, and a fair conductor of heat and electricity. It is used in RTDs because it has good temperature linearity over a wide operating range.
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Nickel - Iron
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A nickel - iron alloy is used in RTDs because it has specific, measurable temperature linearity properties.
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Copper
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Copper is used in RTD elements because it has good temperature linearity over a wide operating range.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Length
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The length of the RTD housing.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Width / Diameter
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The dimension measuring the smaller side of the RTD housing. It will either be a diameter or width across the smaller face.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Multi-element?
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Multi-element means there are 2 or more sensor elements within a sensor transducer package. This provides redundancy in case one element fails.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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