> For the complete documentation index, see [llms.txt](https://docs.bituo-technik.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bituo-technik.com/product-document/overview.md).

# Overview

## Product Overview

**Bituo Technik** is a forward-looking provider of electrical monitoring technologies, with a strong R\&D focus on electrical safety and energy efficiency.

We offer two major product categories:

<table data-header-hidden><thead><tr><th width="127"></th><th></th><th></th></tr></thead><tbody><tr><td></td><td><strong>Electrical Monitoring Devices</strong></td><td><strong>Electrical Measurement Components</strong></td></tr><tr><td><strong>Description</strong></td><td>Smart devices designed for fast, seamless integration into new or existing panels and boxes, ensuring safe, efficient, and connected operation.</td><td>Reliable electronic components and systems for residual current detection and power monitoring &#x26; metering, tailored for renewable energy and industrial applications.</td></tr><tr><td><strong>Products</strong></td><td><ul><li>SPM Series - Miniature Energy Meters</li><li>SDM Series - Compact DIN-Rail Energy Meters</li><li>SRS Series - Smart Relay Switches
</li></ul></td><td><ul><li>BRCS Series - AC/DC Residual Current Sensors for EV Charging</li><li>BSCT Series - Split-Core Current Transformers</li></ul></td></tr></tbody></table>

***

### Electrical Monitoring Devices

{% tabs %}
{% tab title="SPM Series" %}

#### SPM Series — Miniature Energy Meters

> The world's smallest real-time energy monitors with integrated communication, designed to install above or below circuit breakers with no extra DIN rail space required.

**Wireless Communication Variants**

<table><thead><tr><th width="181">Model</th><th>Applicaton</th><th width="143">Voltage</th><th width="107">Max Current</th><th>Connectivity</th></tr></thead><tbody><tr><td><a href="/product-document/spm-series/spm01-flex.md">SPM01 FLEX</a></td><td>Single-phase</td><td>220–240 VAC</td><td>63 A</td><td>Wi-Fi / Zigbee / BLE</td></tr><tr><td><a href="/product-document/spm-series/spm02-flex.md">SPM02 FLEX</a></td><td>Three-phase</td><td>220–240 / 380–415 VAC</td><td>63 A</td><td>Wi-Fi / Zigbee / BLE</td></tr><tr><td><a href="/product-document/spm-series/spm01-mcbm.md">SPM01 MCBM</a></td><td>Single-phase</td><td>220–240 VAC</td><td>63 A</td><td>Wi-Fi / Zigbee / BLE</td></tr><tr><td><a href="/product-document/spm-series/spm02-mcbm.md">SPM02 MCBM</a></td><td>Three-phase</td><td>220–240 / 380–415 VAC</td><td>63 A</td><td>Wi-Fi / Zigbee / BLE</td></tr></tbody></table>

**Wired Communication Variants**

<table><thead><tr><th width="181">Model</th><th>Applicaton</th><th width="143">Voltage</th><th width="108">Max Current</th><th>Connectivity</th></tr></thead><tbody><tr><td><a href="/product-document/spm-series/spm01r-flex.md">SPM01R FLEX</a></td><td>Single-phase</td><td>220–240 VAC</td><td>63 A</td><td>Modbus RTU</td></tr><tr><td><a href="/product-document/spm-series/spm02r-flex.md">SPM02R FLEX</a></td><td>Three-phase</td><td>220–240 / 380–415 VAC</td><td>63 A</td><td>Modbus RTU</td></tr><tr><td><a href="/product-document/spm-series/spm01r-mcbm.md">SPM01R MCBM</a></td><td>Single-phase</td><td>220–240 VAC</td><td>63 A</td><td>Modbus RTU</td></tr><tr><td><a href="/product-document/spm-series/spm02r-mcbm.md">SPM02R MCBM</a></td><td>Three-phase</td><td>220–240 / 380–415 VAC</td><td>63 A</td><td>Modbus RTU</td></tr></tbody></table>
{% endtab %}

{% tab title="SDM Series" %}

#### SDM Series — Compact DIN-Rail Energy Meters

> Smart energy meters with split-core clamp CTs. Engineered to meet IEC and UL standards for global markets.

<table><thead><tr><th width="163">Model</th><th>Application</th><th width="183">Voltage</th><th width="178">Max Current</th><th width="196">Connectivity</th></tr></thead><tbody><tr><td><a href="/product-document/sdm-series/sdm01-combo.md">SDM01 Combo</a></td><td>Three-phase</td><td>220–240 (L-N) / 380–415  (L-L)  VAC</td><td><p>120 A (Ø16 CT)</p><p>200 A (Ø20 CT)<br>300 A (Ø24 CT)<br>400 A (Ø36 CT)</p></td><td><ul><li>Wireless: Wi-Fi / Zigbee / BLE</li><li>Wired: RS485</li></ul></td></tr><tr><td><a href="/product-document/sdm-series/sdm02-sp.md">SDM02 SP</a></td><td>Split-phase </td><td>110-240 (L-N) / 208-240 (L<sub>1</sub>-L<sub>2</sub>) VAC</td><td><p>120 A (Ø16 CT)</p><p>200 A (Ø20 CT)<br>300 A (Ø24 CT)</p></td><td>Wi-Fi / Zigbee / BLE</td></tr><tr><td>SDM01G2 Combo</td><td>Three-phase</td><td>220–240 (L-N) / 380–415  (L-L)  VAC</td><td><p>50 A (Ø10 CT)<br>120 A (Ø16 CT)</p><p>200 A (Ø20 CT)<br>300 A (Ø24 CT)<br>400 A (Ø36 CT)</p></td><td><p></p><ul><li>Wireless: Wi-Fi / Zigbee / BLE</li><li>Wired: RS485</li></ul></td></tr><tr><td>SDM01G2X</td><td>Three-phase</td><td>220–240 (L-N) / 380–415  (L-L)  VAC</td><td><p>50 A (Ø10 CT)<br>120 A (Ø16 CT)</p><p>200 A (Ø20 CT)<br>300 A (Ø24 CT)<br>400 A (Ø36 CT)</p></td><td>Wi-Fi / Zigbee / BLE / LoRaWAN (External Antenna)</td></tr></tbody></table>
{% endtab %}

{% tab title="SRS Series" %}

#### SRS Series — Smart Relay Switches

> Compact smart relays with integrated power monitoring, designed for flush-mounted wall boxes and ceiling installations.

| Model                                                  | Channels                | Max Current                                  | Metering      | Communication        |
| ------------------------------------------------------ | ----------------------- | -------------------------------------------- | ------------- | -------------------- |
| [SRS01-1PM](/product-document/srs-series/srs01-1pm.md) | 1 × relay               | 16 A (Resistive)                             | V / I / P / E | Wi-Fi / Zigbee / BLE |
| [SRS01-2PM](/product-document/srs-series/srs01-2pm.md) | 2 × relay (independent) | 10 A per channel, max 16 A total (Resistive) | V / I / P / E | Wi-Fi / Zigbee / BLE |
| {% endtab %}                                           |                         |                                              |               |                      |
| {% endtabs %}                                          |                         |                                              |               |                      |

***

### Electrical Measurement Components

{% tabs %}
{% tab title="BRCS Series" %}

#### BRCS Series — AC/DC Residual Current Sensors

> Sensors for built-in RDC/RDC-DD at AC EV charging equipment. World's first TÜV-certified sensor for RDC-DD (2019), and 6+ year proven track records.

<table><thead><tr><th width="117">Model</th><th width="147">Mounting</th><th width="135">Supply</th><th>Residual Current Type</th></tr></thead><tbody><tr><td><a href="/product-document/brcs-series.md#model-list">BRCS01C</a></td><td>Cable / PCB / Enclosure</td><td>5 V / 12 V</td><td>Type-A 30mA (IEC60947-2-M / IEC61008-1) ; DC 6 mA(IEC 62955); AC 20mA (UL2231-2:CCID20)</td></tr><tr><td><a href="/product-document/brcs-series.md#model-list">BRCS03C</a></td><td>PCB (copper jumper)</td><td>5 V</td><td>Type-A 30mA (IEC60947-2-M / IEC61008-1) ; DC 6 mA(IEC 62955); AC 20mA (UL2231-2:CCID20)</td></tr><tr><td><a href="/product-document/brcs-series.md#model-list">BRCS03X</a></td><td>PCB (Horizontal Through-hole)</td><td>5 V</td><td>Type-A 30mA (IEC60947-2-M / IEC61008-1) ; DC 6 mA(IEC 62955); AC 20mA (UL2231-2:CCID20)</td></tr><tr><td><a href="/product-document/brcs-series.md#model-list">BRCS01V</a></td><td>PCB (Vertical Through-hole)</td><td>5 V</td><td>Type-A 30mA (IEC60947-2-M / IEC61008-1) ; DC 6 mA(IEC 62955); AC 20mA (UL2231-2:CCID20)</td></tr></tbody></table>

> 💡 IEC and UL versions share the same hardware but differ in pin assignments and output logic. Always select the correct version for your target market.
> {% endtab %}

{% tab title="BSCT Series" %}

#### BSCT Series — Split-Core Current Transformers

> High-accuracy split-core CTs with 100% factory accuracy testing. Originally developed for the SDM series, available as standalone components.

<table><thead><tr><th>Model</th><th width="132">Aperture</th><th>Rated Current</th><th>Shell Color</th></tr></thead><tbody><tr><td>BSCT-10A / 10C</td><td>10 mm</td><td>50A/16.6mA</td><td>White / Black</td></tr><tr><td>BSCT-16B / 16C</td><td>16 mm</td><td>120A/40mA</td><td>White / Black</td></tr><tr><td>BSCT-20A</td><td>20 mm</td><td>200A/66.6mA</td><td>White </td></tr><tr><td>BSCT-24C</td><td>24 mm</td><td>300A/50mA</td><td>Black</td></tr><tr><td>BSCT-36C</td><td>36 mm</td><td>400A/66.6mA</td><td>Black</td></tr></tbody></table>

> Custom specifications available upon request.
> {% endtab %}
> {% endtabs %}