
Overview
For use with HOBO MX1104 and MX1105 multi-channel data loggers, this split-core AC current transformer offers integrated strain relief, so the probe is secured to the logger. And it features Self-Describing technology to automatically communicate configuration information to the logger, without any programming or extensive user setup.
- Self-Describing technology for quick, easy setup
- Locking jack to ensure sensor is connected and stays connected
- Available in 5 ranges: 2-20, 5-50, 10-100, 20-200, 60-600
- Accuracy of ±2.1% of full scale from 10% to 100%
- AC current, sine wave, single-phase 50 Hz or 60 Hz, load power factor 0.5 to 1.0 lead or lag
- Cable length: 1.8 m (6 ft)
- UL Listed
In what environment does this sensor operate?
This sensor operates in an indoor environment.
What measurements does this sensor support?
The SD-CT-xxx sensor supports the following measurement: AC Current
The country of origin for this product is the United States. To see the full specifications for this product, please see our product manual found under the documentation tab if available.
Current Range | see table |
Accuracy | ±2.1% of full scale (includes logger accuracy) |
Response Time | see table |
Input Current | AC current, sine wave, single-phase 50 Hz or 60 Hz, load power factor 0.5 to 1.0 lead or lag |
Output | 0-2.5 V DC |
Voltage Rating | 600 V AC |
Temperature Rating | see table |
Construction | Molded plastic housing for indoor use per UL508 |
Cable | 1.8 m (6 ft.) |
Window Size | see table |
Dimensions | see table |
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The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). |
Part No. | Current Range (Amps AC) |
Response Time (milliseconds) (from 10% to 90% of Amplitude) |
Dimensions | |||
---|---|---|---|---|---|---|
Window Size | Outer Length | Outer Width | Height | |||
SD-CT-020 | 2–20 | 440 | 28 x 20 mm (1.1 x 0.8 in.) | 79mm (3.1 in.) | 71mm (2.8 in.) | 36mm (1.4 in.) |
SD-CT-050 | 5-50 | 200 | 28 x 20 mm (1.1 x 0.8 in.) | 79mm (3.1 in.) | 71mm (2.8 in.) | 36mm (1.4 in.) |
SD-CT-100 | 10-100 | 100 | 28 x 20 mm (1.1 x 0.8 in.) | 79mm (3.1 in.) | 71mm (2.8 in.) | 36mm (1.4 in.) |
SD-CT-200 | 20-200 | 450 | 39 x 32 mm (1.54 x 1.26 in.) | 100mm (3.92 in.) | 120mm (4.72 in.) | 29mm (1.14 in.) |
SD-CT-600 | 60-600 | 490 | 74 x 62 mm (2.92 x 2.46 in.) | 135mm (5.3 in.) | 150mm (5.91 in.) | 28mm (1.12 in.) |

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Detailed Specifications
HOBO Self-Describing Current Transformer Sensor
Current Range | see table |
Accuracy | ±2.1% of full scale (includes logger accuracy) |
Response Time | see table |
Input Current | AC current, sine wave, single-phase 50 Hz or 60 Hz, load power factor 0.5 to 1.0 lead or lag |
Output | 0-2.5 V DC |
Voltage Rating | 600 V AC |
Temperature Rating | see table |
Construction | Molded plastic housing for indoor use per UL508 |
Cable | 1.8 m (6 ft.) |
Window Size | see table |
Dimensions | see table |
![]() |
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). |
Part No. | Current Range (Amps AC) |
Response Time (milliseconds) (from 10% to 90% of Amplitude) |
Dimensions | |||
---|---|---|---|---|---|---|
Window Size | Outer Length | Outer Width | Height | |||
SD-CT-020 | 2–20 | 440 | 28 x 20 mm (1.1 x 0.8 in.) | 79mm (3.1 in.) | 71mm (2.8 in.) | 36mm (1.4 in.) |
SD-CT-050 | 5-50 | 200 | 28 x 20 mm (1.1 x 0.8 in.) | 79mm (3.1 in.) | 71mm (2.8 in.) | 36mm (1.4 in.) |
SD-CT-100 | 10-100 | 100 | 28 x 20 mm (1.1 x 0.8 in.) | 79mm (3.1 in.) | 71mm (2.8 in.) | 36mm (1.4 in.) |
SD-CT-200 | 20-200 | 450 | 39 x 32 mm (1.54 x 1.26 in.) | 100mm (3.92 in.) | 120mm (4.72 in.) | 29mm (1.14 in.) |
SD-CT-600 | 60-600 | 490 | 74 x 62 mm (2.92 x 2.46 in.) | 135mm (5.3 in.) | 150mm (5.91 in.) | 28mm (1.12 in.) |