Product Description
The PT1000 is a platinum resistance temperature detector (RTD) and a derivative of the PT100 series. The name "PT1000" shares similar meanings to the PT100: "PT" represents the platinum sensitive element, and "1000" refers to its standard resistance of 1000 ohms (Ω) at 0°C. Like the PT100, the PT1000 measures temperature by exploiting the temperature-dependent resistance of platinum. However, its higher base resistance offers several unique advantages, making it particularly suitable for low-power and remote measurement applications.
Specification
Product Name: PT100 Temperature Sensor
Probe Material: Stainless Steel
Sensor Type: -40°C to +125°C
Output Type: RTD (Platinum Resistance Temperature Sensor)
Mounting Type: Insertion
Features
Higher base resistance: This is the core difference between the PT1000 and the PT100. Its resistance at 0°C is 1000Ω, ten times that of the PT100 (100Ω). This feature offers several key advantages:
Significantly Reduced Lead Resistance: The resistance of the connecting wires (typically a few ohms) is a very small component when measuring high resistance values, significantly reducing the error caused by lead resistance. This allows the PT1000 to achieve acceptable measurement accuracy even in a two-wire connection, simplifying system design and wiring costs.
More Suitable for Low-Power Applications: When powered by a constant voltage source, the higher resistance means the sensor consumes less current (according to Ohm's law, I = V/R) and produces less self-heating. This makes it ideal for power-sensitive applications such as battery-powered portable devices and medical electronics.
Higher Sensitivity: While the resistance change rate (α coefficient) is the same as the PT100 (approximately 0.385 Ω/°C), the larger base number results in a greater absolute resistance change per degree of temperature change, making it easier to detect by the measurement circuitry and improving the signal-to-noise ratio.
Inherits the advantages of the PT series: Inherits all the excellent characteristics of platinum resistance sensors, including:
High Accuracy and Stability: Reliable performance with minimal long-term drift.
Excellent Linearity: The resistance-temperature curve is smooth and easy to process.
Wide Operating Range: Typically suitable for measurements from -50°C to +500°C (depending on the package).
Interchangeability: Also compatible with PT1000 sensors that comply with international standards such as IEC 60751.
Application
The PT1000, with its high resistance, offers advantages over the PT100 in the following areas:
Portable and battery-powered devices:
Medical electronics: Applications such as thermometers, wearable health monitors, and ventilators, where its low power consumption is crucial.
Handheld test instruments: Applications such as temperature probes for field measurements.
Automotive electronics: Applications such as in-vehicle air quality sensors, temperature monitoring in battery management systems (BMS), and air conditioning systems.
Home appliance industry: Applications such as temperature control for smart appliances and white goods (such as refrigerators and washing machines), where cost-effectiveness and simplified wiring are key considerations.
HVAC and building automation: Applications such as room temperature sensors and temperature monitoring in ventilation systems, particularly where long wiring runs are required.
Industrial control: Applications where measurement accuracy is less critical but simplified wiring or reduced power consumption is desirable.
In summary, the PT1000 is an important variant of the PT100. Its higher base resistance offers significant advantages in reducing lead wire errors and reducing power consumption. It is an ideal choice for simplifying system design, reducing wiring costs, and meeting specific low-power requirements, especially in the consumer electronics, medical, and automotive fields.
