The Additel AccuMac AM 1730 is a high-precision secondary reference platinum resistance thermometer designed for accurate temperature measurement and calibration in laboratories, industrial facilities and demanding field applications.
With a temperature range from −200 °C to +420 °C, excellent short-term stability of less than 0.007 °C and an ISO/IEC 17025 accredited calibration included as standard, the Additel AccuMac AM 1730 provides reliable performance for professional temperature metrology.
The reference thermometer combines a specially designed platinum sensing element with a robust Inconel sheath to provide excellent long-term stability, low hysteresis and resistance to mechanical and thermal shock.
Its nominal resistance of 100 Ω and temperature coefficient of 0.003925 Ω/Ω/°C make it suitable for precision temperature measurement using compatible reference thermometer readouts.
The Additel AccuMac AM 1730 is available in different probe lengths and configurations, including a bent version for specialized calibration applications.
It is particularly suitable for comparison calibrations in liquid baths, dry block calibrators and temperature calibration laboratories.
For professional calibration equipment and metrological traceability, europascal provides technical support and calibration services.
Learn more about the europascal Calibration Service.
Your Benefits at a Glance
The Additel AccuMac AM 1730 offers outstanding performance for demanding temperature measurement applications.
Its main advantages include:
- Wide temperature range from −200 °C to +420 °C
- High-precision secondary reference platinum resistance thermometer
- Nominal resistance of 100 Ω
- Temperature coefficient of 0.003925 Ω/Ω/°C
- Calibrated accuracy of ±0.015 °C at 0.01 °C
- Calibrated accuracy of ±0.025 °C at −40 °C
- Calibrated accuracy of ±0.035 °C at +420 °C
- Excellent short-term stability below 0.007 °C
- Long-term drift below 0.01 °C under specified conditions
- Low hysteresis of 0.005 °C or less
- Excellent resistance to thermal shock
- Robust Inconel protective sheath
- Specially designed platinum sensing element
- Four-wire resistance measurement
- Measurement current of 0.5 mA or 1 mA
- Available with 6.35 mm or 4.775 mm sheath diameter
- Straight and angled probe configurations
- Compatible with suitable Additel reference thermometer readouts
- ISO/IEC 17025 accredited calibration included
- Suitable for laboratory and field calibration
Wide Temperature Range from −200 °C to +420 °C
The Additel AccuMac AM 1730 provides a wide operating temperature range of:
−200 °C to +420 °C
This makes the reference thermometer suitable for both low-temperature and high-temperature calibration applications.
Typical temperature measurement points include:
- −196 °C
- −100 °C
- −40 °C
- 0.01 °C
- +50 °C
- +100 °C
- +200 °C
- +300 °C
- +420 °C
The wide temperature range allows the same reference thermometer to be used for numerous calibration tasks.
Applications include temperature measurements in liquid calibration baths, dry block calibrators and industrial temperature calibration systems.
The operating temperature range must not be confused with the calibrated temperature range stated on an individual calibration certificate.
The actual calibrated range and uncertainty depend on the calibration performed.
High Temperature Accuracy
The Additel AccuMac AM 1730 provides excellent calibrated accuracy.
The manufacturer specifies the following values:
| Temperature | Calibrated Accuracy |
|---|---|
| −40 °C | ±0.025 °C |
| +0.01 °C | ±0.015 °C |
| +420 °C | ±0.035 °C |
These values are specified with a coverage factor of:
k = 2
The manufacturer’s calibrated accuracy specification includes calibration and drift contributions under the stated conditions.
For professional temperature calibration, the uncertainty of the complete measurement system must be considered.
This includes the reference thermometer, thermometer readout, calibration medium and measurement conditions.
The individual ISO/IEC 17025 calibration certificate provides the relevant calibration results and associated uncertainties.
Excellent Short-Term Stability
The Additel AccuMac AM 1730 provides excellent short-term stability.
The manufacturer specifies:
Less than 0.007 °C
Short-term stability describes the variation of the reference thermometer indication under stable measurement conditions.
Excellent stability is particularly important when the thermometer is used as a reference during comparison calibration.
Stable reference measurements help reduce uncertainty contributions caused by temperature fluctuations.
The specially designed sensing element supports reliable and repeatable measurements.
Low Long-Term Drift
The Additel AccuMac AM 1730 is designed for excellent long-term stability.
The manufacturer specifies a drift of:
Less than 0.01 °C
This value refers to measurements at the triple point of water after 100 hours of exposure to the maximum operating temperature.
Low long-term drift is particularly important for reference thermometers used regularly in calibration laboratories.
It helps maintain reliable measurement performance between calibration intervals.
Actual drift depends on handling, operating conditions, thermal exposure and maintenance.
Regular recalibration remains necessary to verify the performance of the reference thermometer.
Low Hysteresis
The Additel AccuMac AM 1730 features low temperature hysteresis.
The manufacturer specifies:
≤0.005 °C
Hysteresis describes differences in thermometer indication that may occur depending on the previous temperature exposure.
Low hysteresis is particularly important when measurements are performed over a wide temperature range.
It helps improve repeatability when switching between low and high calibration temperatures.
The sensor construction is designed to minimize mechanical stresses in the platinum sensing element.
Excellent Thermal Shock Resistance
The Additel AccuMac AM 1730 is designed to withstand demanding thermal conditions.
The manufacturer specifies a thermal shock effect of:
Less than 0.005 °C
This value applies after ten thermal cycles between the minimum and maximum operating temperatures under the specified test conditions.
The sensor design helps reduce measurement changes caused by repeated temperature cycling.
This makes the thermometer suitable for calibration procedures involving frequent temperature changes.
However, appropriate handling and controlled temperature transitions are still recommended to protect the sensor and maintain long-term performance.
High-Quality Platinum Sensing Element
The Additel AccuMac AM 1730 uses a specially designed platinum resistance sensing element.
The sensing element is engineered to minimize contamination and mechanical stress.
A dedicated supporting structure and filling material help balance thermal shock resistance, mechanical stability and hysteresis performance.
The sensor meets the relevant ITS-90 criteria for reference thermometers.
This makes the Additel AccuMac AM 1730 suitable for precision temperature measurement using individually calibrated resistance-temperature characteristics.
For accurate temperature calculations, the calibration coefficients supplied with the thermometer should be used in a compatible reference readout.
Nominal Resistance of 100 Ω
The Additel AccuMac AM 1730 has a nominal resistance of:
100 Ω at 0.01 °C
The specified temperature coefficient is:
0.003925 Ω/Ω/°C
This characteristic differs from the commonly used industrial Pt100 characteristic with a nominal temperature coefficient of approximately 0.00385 Ω/Ω/°C.
For accurate temperature measurements, the correct sensor characteristic and individual calibration coefficients must be configured in the reference thermometer readout.
Using an incorrect resistance-temperature characteristic can introduce significant measurement errors.
Four-Wire Resistance Measurement
The Additel AccuMac AM 1730 uses a four-wire connection.
Four-wire resistance measurement minimizes errors caused by lead resistance.
Two conductors supply the measurement current, while the other two conductors measure the voltage across the sensing element.
This method is essential for high-accuracy resistance thermometry.
The manufacturer specifies measurement currents of:
0.5 mA or 1 mA
The appropriate current should be selected according to the measurement application.
The influence of sensor self-heating must be considered when evaluating the measurement uncertainty.
Robust Inconel Protective Sheath
The Additel AccuMac AM 1730 features a protective sheath manufactured from Inconel.
Inconel is a nickel-based alloy known for its mechanical strength and resistance to demanding temperature conditions.
The sheath protects the platinum sensing element from mechanical damage and environmental influences.
This construction makes the reference thermometer suitable for professional laboratory and field applications.
The compatibility of the sheath material with the calibration medium should be verified for the intended application.
Available Probe Configurations
The Additel AccuMac AM 1730 is available in several configurations.
AM1730-12
The AM1730-12 features a straight probe with the following dimensions:
Diameter: 6.35 mm
Length: 305 mm
This configuration is suitable for laboratory calibration baths and dry block calibrators with sufficient immersion depth.
AM1730-9
The AM1730-9 features a smaller probe diameter.
Diameter: 4.775 mm
Length: 228.6 mm
The smaller diameter can be advantageous when calibrating sensors in narrow wells or inserts.
AM1730-BEND
The AM1730-BEND features an angled probe design.
The sheath has a diameter of:
6.35 mm
The dimensions are:
247.65 mm vertical section
114.3 mm horizontal section
The bent configuration can be useful in calibration systems where installation space is limited or a straight probe cannot be positioned conveniently.
Fast Response Time
The Additel AccuMac AM 1730 provides a fast thermal response.
The manufacturer specifies the following response times:
| Configuration | Response Time |
|---|---|
| AM1730-12 | 9 seconds |
| AM1730-9 | 6 seconds |
| AM1730-BEND | 9 seconds |
The response time refers to 63% of a temperature step change in moving water at a flow velocity of 1 m/s.
Actual response times depend on the calibration medium, immersion depth and thermal contact.
The smaller diameter of the AM1730-9 provides a faster response under the specified test conditions.
Suitable for Liquid Calibration Baths
The Additel AccuMac AM 1730 is particularly suitable for use as a reference thermometer in liquid calibration baths.
Liquid baths provide excellent temperature stability and uniformity when operated correctly.
The reference thermometer measures the bath temperature while the devices under test are compared against it.
This method is commonly used for calibrating industrial resistance thermometers, precision temperature probes and digital thermometers.
The temperature range and compatibility of the calibration liquid must be considered.
Suitable for Dry Block Calibrators
The Additel AccuMac AM 1730 can also be used with suitable dry block temperature calibrators.
The reference thermometer is inserted into an appropriate calibration insert.
The temperature of the calibration block is measured directly using the reference thermometer.
The device under test is positioned in another suitable calibration hole.
This allows comparison calibration without relying exclusively on the internal temperature indication of the dry block calibrator.
For accurate results, the influence of axial temperature distribution, radial temperature differences, sensor immersion depth and loading effects must be considered.
Compatible Reference Thermometer Readouts
The Additel AccuMac AM 1730 can be used with suitable high-accuracy resistance thermometer readouts.
Examples include compatible Additel temperature measurement instruments.
The readout must support the resistance range and measurement characteristics of the reference thermometer.
Depending on the selected connector configuration, adapters may be required.
Available connection options include:
- Additel smart connector
- Four-wire spade connector
- Compatible connector adapters
The correct connection type should be selected when ordering the thermometer.
ISO/IEC 17025 Accredited Calibration Included
The Additel AccuMac AM 1730 is supplied with an ISO/IEC 17025 accredited calibration.
This provides documented metrological traceability.
The calibration certificate contains the relevant calibration results and associated measurement uncertainties.
For precision temperature measurement, the individual calibration coefficients should be used whenever supported by the thermometer readout.
Regular recalibration is recommended according to the instrument’s use, stability history and required measurement uncertainty.
Technical Highlights
| Specification | Additel AccuMac AM 1730 |
|---|---|
| Manufacturer | Additel |
| Product series | AccuMac |
| Model | AM1730 |
| Product type | Secondary Reference PRT |
| Temperature range | −200 °C to +420 °C |
| Nominal resistance at 0.01 °C | 100 Ω |
| Temperature coefficient | 0.003925 Ω/Ω/°C |
| Calibrated accuracy at −40 °C | ±0.025 °C |
| Calibrated accuracy at 0.01 °C | ±0.015 °C |
| Calibrated accuracy at +420 °C | ±0.035 °C |
| Coverage factor | k = 2 |
| Short-term stability | <0.007 °C |
| Long-term drift | <0.01 °C |
| Thermal shock effect | <0.005 °C |
| Hysteresis | ≤0.005 °C |
| Self-heating coefficient | 50 mW/°C |
| Measurement current | 0.5 mA or 1 mA |
| Sensor element length | 32 mm |
| Sensor position | 3 mm from probe tip |
| Insulation resistance | >1000 MΩ at room temperature |
| Sheath material | Inconel |
| AM1730-12 dimensions | 6.35 × 305 mm |
| AM1730-9 dimensions | 4.775 × 228.6 mm |
| Bent version | Available |
| Electrical connection | Four-wire |
| Cable length | 2 m |
| Handle temperature range | −50 °C to +180 °C |
| Calibration | ISO/IEC 17025 accredited |
Calibration Service by europascal
Regular calibration is essential for maintaining reliable and traceable temperature measurements.
europascal supports customers with professional temperature calibration equipment, reference thermometers and suitable calibration solutions.
The Additel AccuMac AM 1730 can be integrated into calibration systems consisting of a temperature source, reference thermometer readout and device under test.
For demanding calibration applications, the complete measurement uncertainty must be evaluated.
Relevant uncertainty contributions include:
- Reference thermometer calibration uncertainty
- Long-term drift
- Short-term stability
- Thermometer readout uncertainty
- Sensor self-heating
- Immersion depth
- Thermal contact
- Temperature uniformity
- Measurement repeatability
europascal can assist with the selection of suitable temperature calibration equipment and metrological services.
For further information, visit the europascal Calibration Service.
Why Choose the Additel AccuMac AM 1730?
The Additel AccuMac AM 1730 combines high temperature measurement accuracy with excellent stability and robust construction.
Its wide temperature range from −200 °C to +420 °C makes it suitable for numerous laboratory and industrial calibration applications.
The platinum sensing element is designed to provide excellent repeatability and low hysteresis.
The Inconel protective sheath provides mechanical protection under demanding operating conditions.
Different probe dimensions allow the reference thermometer to be adapted to different calibration systems.
Four-wire resistance measurement supports accurate temperature determination when used with a suitable reference thermometer readout.
The included ISO/IEC 17025 accredited calibration provides documented metrological traceability.
For calibration laboratories and industrial users requiring a reliable secondary reference thermometer, the Additel AccuMac AM 1730 offers an excellent combination of accuracy, stability and flexibility.
Typical Applications for the Additel AccuMac AM 1730
The Additel AccuMac AM 1730 is suitable for professional temperature measurement and calibration applications.
Typical applications include:
- Precision temperature measurement
- Reference temperature measurement
- Pt100 calibration
- Pt1000 calibration
- RTD calibration
- Temperature sensor comparison calibration
- Liquid bath calibration
- Dry block calibration
- Temperature calibration laboratories
- Industrial quality assurance
- Pharmaceutical manufacturing
- Biotechnology
- Research and development
- Temperature metrology
- Calibration system validation
- Field calibration
The combination of high accuracy, excellent stability and robust construction makes the Additel AccuMac AM 1730 a reliable reference thermometer for professional temperature calibration.
Find more Additel products at europascal.
Manufacturer information for the Additel AccuMac AM 1730 can be found on the official Additel website.
