Sigma 2008A Products of this series are the first generation of Digital Conductivity Meter designed with eddy phase. These products may be used for distinguishing, grading, and state detecting for non-ferromagnetic metal. These are commonly used in industries of machinery, electric power, aviation, aerospace, nuke, military, etc.
● Beautiful appearance, easy to carry about and grasp, simple and convenient to use.
● Big screen, big character typeface; displaying measured result, working frequency, temperature, temperature coefficient, etc. simultaneously.
● Properly designed with back-light illumination for reading measured data in poor-light environment.
● Special temperature coefficient setting and auto calibrating mode, convenient and reliable for user to operate.
● Excellent design of lift-off compensation and temperature compensation of the instrument to ensure the precision of measurement.
● With interchangeable probes of the instrument, the user oneself is able to change probes provided by our company without matching.
● With built-in data memory, enough to record 4000 groups of measured data and important measuring parameter; to connect to a computer for forming a complete report.
● Two kinds of measuring units (MS/m or %IACS) for convenient selection. It is easy to switch to resistivity value directly on the measurement interface.
● Three kinds of language selection: Simplified Chinese Characters, Japanese and English.
Model Items | Sigma 2008 A1 | |
Working Freq. | 60KHz, sine wave | |
Measurement range for conductivity | 7.76 %IACS to 112 %IACS, or 4.5 MS/m to 65 MS/m or resistivity 0.01538 to 0.22222Ω•mm²/m | |
Resolving power | 0.01%IACS(when<51%IACS); 0.1%IACS(51%IACS to 112%IACS ) | |
Measuring precision | ±1% ( temp range, 0℃ to 40℃) ±0.5%( temp range, 20℃) | |
Lift-off effect | Probe compensation 500μm | |
Temp. measurement | 0℃ to +50℃(precision 0.5℃) | |
Function of auto compensation | Measured result of conductivity, adjusting to value at temp. 20℃ automatically | |
Normal working environment | Temp. 0℃ to +50℃; relative humidity, 0 to 95% | |
Display | Liquid crystal big screen, back-light designed, multiple items of important parameter displayed simultaneously. | |
Power supply | Equipped with a lithium ion battery of 2200mA/h | |
Probes | One probe of diameter ¢14mm, working freq. 60KHz, for instrument model A; Probes are interchangeable. | |
Reading memory | Storage for 500 groups of measured data files. | |
Communication with PC machine | RS 232 interface | |
Weight of host machine | 0.5kg (including batteries) | |
Dimension of host machine | 220mmx95mmx55mm | |
Shell of instrument | Engineering plastic, high impact-resistance, waterproof shell for this instrument | |
Package and protection | High impact-resistance, waterproof, portable box made of aluminium alloy; inside of it there are instrument, probes, communication cable, operation manual, conductivity blocks, recharger, instrument stand, optical disk. | |
Accessories | 2 pieces of standard conductivity blocks for model A1. You can purchase more blocks if you wish. | |
● Conductivity and resistivity measurement of
● non-ferromagnetic material
● Determining extent of thermal treatment
● Checking thermal damage, material fatigue and crack
● Determining metal purity
● Monitoring of metal homogeneity
● Metal classification
● Monitoring of strength and hardness
● Detecting the density of powder metallurgy parts
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The primary indexes comparing of
Sigma2008A/B/C series’ eddy current conductivity meters
Items Model | Measurement range | Lift-off | Working Freq. | Measurement area | Camber measurement | Auto.Compensation | Reading memory | Measuring precision |
Sigma 2008B | 0.51%～112%IACS (full measuring range) | 0.5mm | 60KHz and 500KHz | Minimum of 8mm Small area and ribbon | With curvature compensation function | Three temperature compensation modes Same or different temperature condition (automatically or manually) | Save 500 sets of data, and can upload to the computer | ±0.5% of measurements |
Sigma 2008B1 | 60KHz | Minimum of 14mm |
Items Model | Measurement range | Lift-off | Working Freq. | Measurement area | Camber measurement | Auto. Compensation | Reading memory | Measuring precision |
Sigma 2008A | 0.51%～112%IACS (full measuring range) | 0.5mm | 60KHz | Minimum of 14mm | None | Two temperature compensation modes Same or different temperature condition (manually) | Save 500 sets of data, and can upload to the computer | ±0.5% of measurements |
Sigma 2008A1 | 7.76～112%IACS |
Items Model | Measurement range | Lift-off | Working Freq. | Measurement area | Camber measurement | Auto. Compensation | Reading memory | Reading memory |
Sigma 2008C | 0.51%～112%IACS (full measuring range) | 0.1mm | 60KHz | Minimum of 14mm | None | One temperature compensation mode Same temperature condition | Save 500 sets of data, and can upload to the computer |
±1% of measurements |
Sigma 2008C1 | 7.76～112%IACS | None |
1. Measurement range:
The measurement range of model A, B, B1 or C is large. Besides copper, copper alloy, aluminum and aluminum alloy, the instrument can also measure titanium, titanium alloy and other low conductivity non-ferrous metal. It is the only real full measuring range instrument in China. You needn’t separately buy high or low conductivity instrument, but one our instrument is enough.
2. Lift-off compensation
Lift-off compensation is a important parameter of eddy current conductivity meter, which means the instrument’s capacity for overcoming the non-conductive layer (as paint, coating, etc.) above the tested material. Model A, A1, B or B1 is the same as foreign same type instrument, and the only instrument whose lift-off compensation is up to 0.5mm in China. Even if there are coating, paint, or other impurity and rough surface above the tested material, you could get the accurate testing data only if the gap is less than 0.5mm.
3. Working frequency
The currently used working frequencies are 60 KHz and 500 KHz, 60 KHz for aviation industry standard, 500 KHz for detecting sheet metal. Model B is the only instrument, which has a high and a low frequency probes and the high frequency probe is up to 500 KHz. The high frequency probe can be used for too thin workpiece whose thickness is 0.1mm to 0.3mm, so you no longer have to worry about measuring too thin workpieces.
4. Measurement area
The diameter of eddy current conductivity meter’s probe is usually between 13mm and 14mm, but model B has a big probe and a small probe whose diameter is 8mm. The probe is used of electromagnetic shielding technology, that the measured material needn’t be more than twice the size of probe. It can measure the small workpiece with the minimum value of 8mm, so you no longer have to worry about measuring too small workpieces.
5. Measuring camber and rapid sorting
Model B has unique camber modification technology, with the special camber measurement mode and “∧” shape probe cover, the camber material can be measured stably.
Model B has continuity measurement function, which can help you sort materials quickly by setting the upper and lower bound warning, in order to maximize efficiency
6. Temperature compensation
The other instruments in China have only virtual temperature compensation mode, which can measure accurately only when the calibration standard block’ temperature is same as the measured material. Model B used the advanced technology from Germany. It is the only instrument in China, which has the real full-automatic temperature compensation. Even if the block’s temperature is different with the material, it could automatically compensate the standard values.
7. Data storage
All models can save 500 sets date. It can be set as auto-saving without affecting the operating speed. You no longer have to take notes but easily view the measurements at any time, that also reduce manual error rate. All models except C of Sigma series’ instruments can connect the computer and upload data to the computer to organize and print
8. Measurement accuracy
Each model’s indicators and functions are different from the other, but the most critical parameter called measurement accuracy of instrument is uncompromising. All models’ accuracy is up to ±0.5% ~ ±1% as the foreign same type instrument, to ensure the most precise measurements.
9. Measurement parameter
Every models have three kinds of measurement parameters are “MS/m”, “%IACS” and “ῼ • mm²/m”, one keyboard toggle without manual handling, be wonderfully easy to use.
