AccuMac AM1751 Secondary Reference PRT

The AccuMac AM1751 Secondary Reference Platinum Resistance Thermometer (PRT) is designed for calibration professionals who require exceptional accuracy, long-term stability, and reliable performance across a wide temperature range. Engineered for use in accredited calibration laboratories, industrial metrology facilities, and high-precision temperature calibration applications, the AM1751 delivers the confidence needed for traceable temperature measurements.Trusted by metrology laboratories worldwide, the AM1751 has earned a reputation for outstanding repeatability, minimal drift, and rugged durability, making it an ideal reference thermometer for both laboratory and field use.

Key Features

• Wide temperature range from -200 °C to +670 °C
• Accuracy as low as ±0.015 °C
• Excellent short-term stability better than ±0.007 °C
• Long-term drift below ±0.01 °C after 100 hours at 661 °C
• Hysteresis ≤ 0.005 °C
• Superior thermal shock resistance
• Robust Inconel® sheath for enhanced durability
• ISO/IEC 17025 accredited calibration available
• Available in multiple lengths and configurations

Outstanding Performance Across the Entire Range

The AM1751 is designed to maintain exceptional metrological performance from cryogenic temperatures to high-temperature calibration points. Its carefully constructed platinum sensing element delivers highly repeatable measurements with extremely low uncertainty, making it suitable for demanding calibration and verification tasks.

Built for Long-Term Stability

Reference thermometers are only as valuable as their ability to maintain performance over time. The AM1751 features exceptionally low drift and hysteresis, helping laboratories reduce recalibration intervals, improve confidence in measurement results, and maintain traceability with minimal correction factors.

Stability Characteristics

• Short-term stability: < ±0.007 °C
• Long-term drift: < ±0.01 °C after 100 hours at 661 °C
• Thermal shock effect: < 0.005 °C after 10 cycles between -200 °C and +670 °C
• Hysteresis: ≤ 0.005 °C

Rugged Construction for Laboratory and Industrial Environments

The sensing element is protected by a durable Inconel® sheath that provides excellent resistance to mechanical stress and harsh thermal conditions. This robust design allows the AM1751 to perform reliably in calibration laboratories, production environments, and field calibration applications alike.

Applications

The AccuMac AM1751 is ideally suited for:

• Calibration of dry-block calibrators
• Calibration of liquid temperature baths
• Reference temperature measurements in accredited laboratories
• Calibration of industrial RTDs and temperature sensors
• Pharmaceutical and life science validation processes
• Aerospace, automotive, energy, and manufacturing industries
• Research and development laboratories

Available Configurations

To meet a variety of calibration requirements, the AM1751 is available in multiple configurations:

• 12 in (305 mm) probe length
• 20 in (500 mm) probe length
• Bent version for specialized installations

Additional accessories include smart connectors, various connection options, and protective carrying cases for secure transportation and easy identification of calibration data.

Why Calibration Laboratories Choose the AM1751

Accredited calibration and metrology laboratories rely on the AM1751 because it delivers an optimal balance between the ultra-high accuracy of laboratory SPRTs and the practicality of industrial PRTs. Its combination of precision, stability, durability, and ease of use makes it one of the most trusted secondary reference thermometers available today.

Technical Specifications

• Temperature range: -200 °C to +670 °C
• Nominal resistance: 100 Ω at 0 °C
• Alpha coefficient: 0.003925 Ω/Ω/°C
• Response time (t63): approximately 9 seconds
• Sheath material: Inconel®
• Accredited calibration: ISO/IEC 17025
• Measurement current: 0.5 mA or 1 mA

The Reference Standard for Demanding Calibrations

Whether you are calibrating temperature baths, dry-block calibrators, industrial RTDs, or critical process instrumentation, the AccuMac AM1751 provides the accuracy, stability, and reliability required for professional temperature calibration. It is the preferred choice for laboratories seeking a dependable secondary reference thermometer with proven performance across the entire temperature range.