> For the complete documentation index, see [llms.txt](https://help.sbtinstruments.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sbtinstruments.com/technical-documentation/hardware/technical-specification.md).

# Technical specification

## Measurement

<table><thead><tr><th width="232">Parameter</th><th>Value</th></tr></thead><tbody><tr><td>Measurement principle</td><td>Electrical impedance flow cytometry</td></tr><tr><td>Target organisms</td><td>Bacterial cells in suspension</td></tr><tr><td>Output parameters</td><td>Cell concentration (cells/mL), cell size</td></tr><tr><td>Linear quantification range</td><td>3 × 10⁴ – 5 × 10⁶ cells/mL</td></tr><tr><td>Measurement time</td><td>~2 minutes per sample</td></tr><tr><td>Sample preparation</td><td>Dilution required. Homogenization needed for aggregating samples.</td></tr><tr><td>Precision and accuracy</td><td>See <a href="/technical-documentation/performance/precision-and-accuracy.md">precision and accuracy</a></td></tr></tbody></table>

## Instrument

<table><thead><tr><th width="232">Parameter</th><th>Value</th></tr></thead><tbody><tr><td>Form factor</td><td>Benchtop instrument</td></tr><tr><td>Dimensions (W × D × H)</td><td>240 × 140 × 60 mm (9.4 × 5.5 × 2.4 in)</td></tr><tr><td>Net weight</td><td>1 200 g</td></tr><tr><td>Input voltage</td><td>12 V⎓ / 2 500 mA / 30 W</td></tr><tr><td>Software</td><td>Included. Visualization, growth curves, and data export.</td></tr></tbody></table>

## Operating conditions

<table><thead><tr><th width="232">Parameter</th><th>Value</th></tr></thead><tbody><tr><td>Operating temperature</td><td>20–25 °C</td></tr><tr><td>Extended operating temperature</td><td>10–40 °C. <a href="/troubleshooting/contact-support.md">Contact SBT</a> first.</td></tr></tbody></table>

## Power usage

BactoBox® power usage in various situations.

| Situation | Average |   Peak |
| --------- | ------: | -----: |
| Idle      |  3.60 W | 3.84 W |
| Measure   |  6.00 W | 13.9 W |

{% hint style="info" %}
The power usage peaks whenever the flow changes direction or quickly accelerates. These peaks usually last for a very short duration.
{% endhint %}


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