Here are portable and digital style Eddy Conductivity Meters of series of Sigma 2008 C. These products are the patent ones from our Company. The technical performance stands at the leading position in China. These are the only ones being able to replace similar products from abroad. This kind of Digital Conductivity Meters are designed with eddy detection method. These products may be used for distinguishing, grading and so forth detecting, on conductivity with non-ferromagnetic metal. These are commonly used in industries of metallurgy, machinery, electric power, aviation, aerospace, nuclear, military, etc.
• Advantages are: beautiful appearance, easy to carry about and grasp, it’s convenient for calibration and bring about during going-out.
• Measuring range covers all nonferrous metal materials, 0.51~112%IACS or 0.3~65MS/m.
• Excellent design of temperature compensation and calibration style of the instrument enables the operation to be easier and more reliable.
• It is equipped with built-in data memory, enough to store 4000 groups of measured data and important measuring parameters. It is connected to a computer for forming a complete report.
• This instrument is excellent designed of lift-off compensation to ensure the precision of measurement.
• There are two kinds of measuring units (MS/m or %IACS) for convenient selection. It is easy to switch to resistivity reading directly on the measurement interface.
• It displays simultaneously the measured result, the measuring frequency, the measuring time and so forth important parameters.
• It is properly designed with back-light illumination for reading measured data in poor-light environment.
• There are three kinds of language for user’s selection: Simplified Chinese Characters, Complex Form Chinese Characters and English..
Models Items | Sigma 2008C | |
Working Freq. | 60kHz | |
Measurement range for conductivity
| 0.51%IACS~112%IACS, or 0.3 MS/m~65 MS/m ,or resistivity 0.0154~3.3333Ω·mm²/m | |
Resolving power | 0.01%IACS(when when<51%IACS); 0.1%IACS(from 51%IACS to 112%IACS ) | |
Measuring precision | ±0.5% (at temp. 20 0C); ±1% ( temp range, from 00C to 400C) | |
Lift-off effect | Compensation 0.1mm | |
Function of auto compensation | Measured result of conductivity, adjusting to value at temp. 200C automatically | |
Normal working environment | Temp. from 00C to +500C; relative humidity, from 0 to 95% | |
Display | Medium size screen, displaying conductivity, frequency, time | |
Power supply | Equipped with best performance lithium ion rechargeable battery | |
Sensor | One sensor of diameter ¢14mm, working freq. 60kHz.. | |
Reading memory | It is available to store up to 500 groups of measured data. | |
Communication with PC machine | RS232 serial interface | |
Weight of the host machine | The weight is 0.3kg (including batteries) | |
Dimensions of the host machine | 170mmx88mmx50mm | |
Shell of instrument | Impact-resistance, Engineering plastic shell, Anti-electric-power rubber shell. | |
Package and protection | High impact-resistance, portable box, inside of it there are instrument, sensors, communication cable, operation manual, conductivity standard-blocks, recharger, optical disks . | |
Accessories | 2 pieces of standard conductivity blocks， 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.
