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Bituo Technik

SPM02/FLEX Miniature Energy Meter

SPM02/FLEX Miniature Energy Meter

€47,73
€47,73
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Connectivity
The SPM02 Miniature Energy Meter (Flexible version) is an advanced electrical monitoring device designed for three-phase applications. With its compact size, it is ideal to installed above or below circuit breakers, requiring no space on Din-rails. The SPM02 offers precise, real-time data collection for energy consumption, ensuring seamless integration into energy management systems.

- Space saving: Fits easily into new or existing power distribution boards without taking DIN-rail space
- Real-time Monitoring: Tracks voltage, current, power, and energy for efficient management 
- Large Aperture: Supports cable sizes up to 16mm² with a 9.6mm aperture for maximal 63A measurement.
- Accurate Metering: Provides Class 1 energy measurements according to IEC 61557-12 standards
- Seamless Connectivity: Supports Wi-Fi, Zigbee, and BLE, offering a range of connectivity options for integration into home or industrial energy management systems.
- Innovative Architecture: Combines a communication SoC with a metering MCU for OEM/ODM firmware customization

Download: Datasheet | Manual

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Variant Variant total Quantity Price Variant total
Tuya Wi-Fi
Tuya Wi-Fi
€47,73/ea		 €0,00
€47,73/ea €0,00
Open Wi-Fi
Open Wi-Fi
€53,07/ea		 €0,00
€53,07/ea €0,00
Std. Zigbee
Std. Zigbee
€55,73/ea		 €0,00
€55,73/ea €0,00
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Pass-through hole for L wire

L wire passes through the hole for current measurement.

Forward Energy Flow Direction

The arrow indicates forward / positive power flow for installation.

Cable for L Connection

This brown, black and grey cables connect to power supply from Line and voltage meaurement.

Reset Button

Hold for 3–5 seconds to activate 2.4GHz wireless communication pairing or to reset the configuration.

Indicator Light

LED Indicator shows device operation and network status through different flashing patterns.

Cable for Neutral (N) connection

The blue cable connects to power supply from Neutral and voltage meaurement.

Technical Information

  • Rated voltage Un: ~220-240 VAC (L-N), 50/60 Hz; ~380-415 VAC (L-L), 50/60 Hz
  • Max current Imax: 63 A
  • Over-voltage category: III
  • Rated insulating voltage Ui: 440 V
  • Rated impulse withstand voltage Uimp: 4 kV
  • Pollution degree: 3
  • Protection degree: IP20
  • Energy measurement accuracy: Class 1 (active energy)
  • Maximum power consumption: ≤ 2 VA
  • Rated operating temperature: -25℃ to 70℃
  • Communication type: Wi-Fi; BLE+Wi-Fi; Zigbee

Select the Connectivity that Meets Your Needs

SPM02-*2TW (Tuya Wi-Fi)

SPM02-*2EW (Open Wi-Fi)

SPM02-*2TZ-U01 (Std. Zigbee)
Communication Type Wi-Fi BLE + Wi-Fi Zigbee
Communication API Tuya Proprietary MQTT, HTTP, UDP, BLE, etc. Standard Zigbee 3.0 Clusters / Attributes
Smart Home System Integration Tuya/Smart Life Home Assistant Home Assistant, SmartThings, Homey
Commercial Project Integration Tuya Cloud Customer-specific cloud or Hub Zigbee gateway
Wireless Communication SoC Firmware Customization Yes (In collarboration with Tuya) Yes (ESP32-8685) Yes (EFR32MG21)
Recommended Users Energy IoT Beginners Professional DIYers, System Integrators System Integrators

FAQ

Does SPM02 support bi-directional energy measurement?

Yes. The real energy flowing in the same direction as the energy flow arrow printed on the sensor housing is counted as forward energy.

Can I get a discount if I buy more units?

Yes. For bulk orders, you can refer to our Bulk Sales policy.

If you are interested in becoming a certified reseller, system integrator, or installer, you are also welcome to contact us directly via the email, WeChat, or WhatsApp details provided in the page footer.

How long does it take to ship after placing an order?

Orders are dispatched from our warehouse in Shanghai. Under normal conditions, delivery to most countries worldwide takes around 7–14 days.

We are also in the process of establishing a stock location in Germany, expected to be ready by the end of 2025. Once operational, delivery times to EU countries will be further reduced.

What happens to energy data if the internet is disconnected?

The SPM02 FLEX continues to record cumulative energy consumption locally even when offline. No data is lost — once the internet connection is restored, the device automatically syncs the total accumulated energy to the cloud.

If the offline period is too long, the system may not display smaller time-scale energy data correctly.

How do I set up Wi-Fi for the SPM02 Open Wi-Fi version?

There are three commissioning methods:

1) Using the BT Powerlink App

You can configure the device via Bluetooth using our official mobile app.

2) Using our Windows configuration tool

Wi-Fi credentials can also be provisioned through BLE using our Windows application.

3) Integrating with your own app

If you prefer to configure the device through your own mobile application, please contact us for the BLE API documentation.

Can the SPM02 FLEX be flashed with custom firmware?

Technically yes, both the Open Wi-Fi and Standard Zigbee versions can be flashed.
However, we strongly advise against doing so, as the device contains high-voltage circuits that pose safety risks during modification.

In fact, beyond the versions listed on this page, we also provide Tasmota Wi-Fi, Tuya Zigbee, and several other firmware variants to suit most use cases. If you require further customization, please contact us for firmware support.

Does the SPM02 FLEX support measurement of three single-phase circuits?

For 220–240V 50/60Hz systems, yes — you can connect the brown, black, and gray live wires to the same phase line, and the device will measure all three single-phase circuits correctly.

For 110–120V 50/60Hz systems, it’s not supported due to internal power supply limitations.

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