2-wire
Simple connection, but both lead resistances add to the measured value. Pt1000 can help limit this error; check cable resistance against your required accuracy.
GUILCOR / TEMPERATURE INTELLIGENCE
Pt1000
temperature sensors
Start with 1,000 Ω at 0 °C. Explore how a Pt1000 responds to temperature, when its higher resistance helps with lead-wire error, and how to match the element, instrument and probe to your installation.
For replacements, send your current sensor and controller references. GUILCOR can help match the complete assembly.
01 / INTERACTIVE OBJECTLoading model…
Drag to rotate · Pinch or scroll to zoom
Platinum RTD element · Shape, dimensions and materials depend on the selected product.
PtPlatinum sensing element
1,000 ΩNominal resistance at 0 °C
2 / 3 / 4Common wiring options
02 / MAKE THE RIGHT MATCH
What is a Pt1000 sensor?
The element is the beginning, not the whole sensor.
A Pt1000 is a platinum resistance temperature detector with a nominal resistance of 1,000 Ω at 0 °C. A compatible instrument measures its resistance and converts it into temperature. The installed result also depends on lead wires, excitation current, thermal contact, electronics and the probe body.
For a reliable recommendation, define the measurement point and the complete assembly, not just “Pt1000”.
01
Instrument
A Pt1000-compatible input, the correct resistance curve, supported wiring and controller reference. A Pt100-only input is not interchangeable.
02
Measurement
Operating and peak temperatures, tolerance and response needs.
03
Installation
Dimensions, insertion depth, mounting, cable and connector.
04
Environment
Moisture, vibration, chemicals, pressure and cleaning conditions.
03 / THE ENGINEERING VIEW
How temperature becomes resistance.
For the common IEC 60751 Pt1000 curve, the Callendar–Van Dusen relationship predicts the element's nominal resistance. It describes the reference curve; it does not guarantee the accuracy or temperature rating of a finished probe.
Callendar–Van Dusen equation
At T ≥ 0 °C
R(T) = R₀ (1 + AT + BT²)At T < 0 °C
R(T) = R₀ [1 + AT + BT² + C(T − 100)T³]For an IEC 60751 Pt1000 reference: R₀ = 1,000 Ω, A = 3.9083 × 10⁻³ °C⁻¹, B = −5.775 × 10⁻⁷ °C⁻² and C = −4.183 × 10⁻¹² °C⁻⁴. Verify the selected element's curve in its datasheet.
EXPLORE THE NOMINAL CURVE
Calculated resistance
Illustrative IEC 60751 calculation. The slider range is not a product operating-range claim.
04 / CONNECTIONS
Choose the wiring your instrument can read.
A Pt1000 reduces the temperature error from a given lead resistance compared with a Pt100 on the same curve, but does not eliminate it. Choose the wiring for your instrument and error budget.
3-wire
A compatible input can compensate for lead resistance when the lead resistances are sufficiently matched.
4-wire
Separates excitation and sensing paths to reduce lead-resistance error. The instrument must support a 4-wire RTD input.
05 / TOLERANCE IS NOT THE WHOLE ERROR
Know what an accuracy class actually covers.
Class A and Class B describe element tolerance on a specified IEC 60751 curve and valid temperature interval. They do not include every contribution from wiring, electronics, self-heating, installation and calibration.
Measuring current warms the element through I²R dissipation. At the same current, a higher resistance dissipates more power. Use the excitation current specified for the selected Pt1000 and compare self-heating and response-time data under the stated test conditions.
| Element class | At 0 °C | At 100 °C |
|---|---|---|
| Class A | ±0.15 °C | ±0.35 °C |
| Class B | ±0.30 °C | ±0.80 °C |
Examples derived from IEC 60751 tolerance expressions. The assembled probe and measuring system can have additional error.
07 / WHERE IT WORKS
A reference for many environments. A different assembly for each.
Consider Pt1000 for HVAC, process control and test equipment with compatible inputs. Match the sheath, mounting and cable to the actual environment; the element alone does not define the complete probe.
01Process & machinery
Check insertion, process connection, pressure and vibration.
02Air & HVAC
Choose the response and enclosure suited to the airflow and installation.
03Test & validation
Define repeatability, dimensions, traceability and the measurement chain.
08 / FORM FACTOR LIBRARY
Choose your Pt1000 probe format
The Pt1000 can take many forms. These are GUILCOR probe families and a design service, not a promise that every format has a Pt1000 option. Confirm the construction for the selected reference.
SELECTION / YOUR APPLICATION
Is Pt1000 the right starting point?
Match the reference to the application.
Your instrument supports the specified Pt1000 curve and wiring, and the nominal resistance matches the configured input.
Review the specification →Review Pt5000 alongside Pt1000.
Compare the nominal resistance, material, reference curve and supported wiring. A shared RTD label does not make two references compatible with the same input.
Explore Pt5000 →Keep the complete specification together.
Keep the existing sensor and instrument references. Check the specified curve, tolerance interval, wire count and complete probe dimensions before choosing a replacement.
Prepare your enquiry →These links support a specification review. They do not establish interchangeable parts or availability of a complete assembly.
More selection details
Start with the instrument. On the same platinum curve, Pt1000 has ten times the nominal resistance of Pt100. For equal lead resistance in a 2-wire circuit, the temperature error is about ten times smaller. Higher resistance alone does not mean a tighter tolerance class.
Lower temperature error from the same lead resistance. Requires a compatible measuring input.
Widely used with industrial RTD inputs. Confirm wiring and lead compensation.
10 / PRACTICAL ANSWERS
Before you send a specification.
These details prevent a “Pt1000” label from turning into the wrong assembled probe.
Does every Pt1000 probe cover the same temperature range?
No. A reference curve or element range is not the rating of every complete probe. Confirm the selected element, sheath, seal, cable and connector limits.
Does Class A mean the whole system is accurate to ±0.15 °C?
No. That value is an element tolerance example at 0 °C. The installed measurement adds instrument, wiring, self-heating and installation effects.
Can a Pt1000 connect directly to any analog input?
No. Use a Pt1000-compatible RTD input or a suitable measurement circuit with excitation and resistance-to-temperature conversion. A general voltage input or a Pt100-only input is not sufficient by itself.
Is 4-wire measurement unnecessary with Pt1000?
No. Its higher resistance reduces the relative effect of lead resistance, but 4-wire measurement can still be useful when the required uncertainty is small and the instrument supports it.
What should I send for a replacement?
Send the existing probe and controller references, operating temperatures, wiring, dimensions, mounting, environment and quantity. A drawing or photo helps verify the assembly.
What is the 3D model showing?
It illustrates the shape of a platinum RTD sensing element. It is not a dimensional model of a selected Pt1000 product or a promise of internal construction.
GUILCOR / YOUR ENQUIRY
Define your Pt1000 enquiry.
Send the electrical reference and the installed probe requirements together. Include the instrument configuration so the sensing element and readout can be reviewed as one measurement chain.
Missing a reference or datasheet?
Send the component marking, equipment reference and any photographs or documents you have. These provide a starting point for identifying what must be confirmed.
The outline helps prepare your enquiry. Copying it does not send a request.
FOUR DETAILS THAT MOVE THE DISCUSSION FORWARD
01
Sensor and instrument
Sensor material, nominal resistance and reference temperature, curve, tolerance class and interval, instrument model and 2-, 3- or 4-wire input.
02
Measurement conditions
Operating and peak temperatures, required system accuracy, response target, measured medium and calibration points.
03
Assembly and connection
Sheath dimensions, insertion and mounting, cable length and insulation, wire count, termination and environmental exposure.
04
Project and validation
Sample and production quantities, target delivery, calibration or documentation needs, and the checks required before approval.