MBMet Range of Weather Sensors
Smart Solar Irradiation Sensor - MBMet-502
MBMet-502 – Reference Cell Irradiance Sensor (Crystalline Cell-Based)
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IEC 61000-4-8
(Power Frequency Magnetic Field Immunity Test)
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IEC 61000-4-18
(Damped Oscillatory Wave Immunity Test)
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Dual-Sensing for Solar Radiation and Temperature
The MBMet-502 Series provides accurate, real-time measurement of both global solar irradiance and sensor surface temperature, making it ideal for precise monitoring of photovoltaic (PV) system performance. It supports data-driven optimization of energy generation and array efficiency.
The MBMet-502 uses a High- Quality Monocrystaline solar cell connected to a High accuracy shunt. Each sensor uses active temperature compensation to compensate for any measurement shifts and errors caused by the temperature co-efficient relationship with the Short Circuit Current. This compensation is done by using a small and highly accurate PT1000 Class A Temperature Sensor attached to the backside of the Solar Cell. The Sensor MBMet-502 is housed in a rugged cast aluminum enclosure that is IP65-rated for protection against dust and water. It is also equipped with an RS-485 interface for easy integration with data acquisition systems. The sensor is easy to install and use, making it a great choice for both professional and DIY solar installers.
Each MBMet-502 Sensor is individually calibrated using a Specially Calibrated Reference Cell along with a Class AAA Solar Simulator. Each Sensor comes along with a serialised and Traceable Calibration Certificate. The Calibration process is strictly followed as per IEC-60904-2 Standard as specified by the IEC-61724-1 Standard, ensuring Reliable and Precise Data.
Advanced Input & Communication Support. The sensor is equipped to handle RTD inputs (PT100/PT1000), analog signals (4–20 mA), and digital inputs, offering high flexibility for mixed-signal PV monitoring setups. With RS-485 Modbus RTU output as standard, MBMet-502 ensures reliable integration with SCADA, MBLogger, and cloud-based analytics platforms.
Housed in a compact enclosure rated for -30°C to +70°C operation, the MBMet-502 is designed for continuous use in diverse field conditions—from solar rooftops to ground-mounted plants in remote locations. Its rugged design supports high-humidity environments up to 99% RH without performance loss.
Benefits & Features
- Measures solar irradiance with the range of ±0-1500 W/m² and ±3% accuracy
- Supports PT100/PT1000 RTD sensors for surface temperature logging
- 4 analog inputs (4–20 mA) and 1 digital input for auxiliary sensor integration
- Operating range: –30°C to +70°C and up to 99% relative humidity
- Fast response time suitable for high-frequency solar performance tracking
- Compact enclosure for pole or panel mount integration
- Low power consumption with 9–32 VDC supply support
- Low power consumption with wide 9–32 VDC input range
- Reliable performance in outdoor, industrial, and energy monitoring projects
Electrical Specifications
| Parameter | Specification |
|---|---|
| Power Supply | 9–32 VDC |
| Power Consumption | Max. 100 mW |
| Communication Protocol | RS-485, Modbus RTU |
| ADC Resolution | 16-bit |
Irradiance Measurement
| Parameter | Specification |
|---|---|
| Measurement Range | 0–1500 W/m² |
| Accuracy | 0.1 W/m² |
| Response Time | 2–3 seconds |
| Long-Term Stability | 0.5% per annum |
| Calibration Standard | IEC 60904-2 |
| Compliance Standard | IEC 61724-1 |
Cell Temperature Measurement
| Parameter | Specification |
|---|---|
| Parameter Measurement Range | –40°C to +90°C |
| Accuracy | ±0.3% FS |
| Resolution | 0.1°C |
RTD Sensor Input (External)
| Parameter | Specification |
|---|---|
| Supported Sensor Types | PT100 / PT1000 (2 inputs) |
| Temperature Range | –30°C to +150°C |
| Accuracy | ±0.3% FS |
| Resolution | 0.1°C |
Analog Input (External Sensors)
| Parameter | Specification |
|---|---|
| Input Channels | 4 channels |
| Input Type | 4–20 mA |
| Resolution | 0.1 |
Digital / Pulse Input
| Parameter | Specification |
|---|---|
| Input Channels | 1 channels |
| Input Function | Digital ON/OFF or Pulse (counter) |
| Max Frequency | 200 Hz |
| Resolution | 0.1 (e.g., 0.1 mm for rainfall input) |
Mechanical & Environmental
| Parameter | Specification |
|---|---|
| Enclosure | Cast Aluminum |
| Ingress Protection | IP65 |
| Dimensions | 125 mm (L) × 80 mm (W) × 57 mm (H) |
| Weight | ~350 g |
| Cable Gland | M12 × 1.5 mm |
| Terminal Size | 1.5 mm² (copper) |
| Mounting Clamp | SS304, 40 mm × 4 mm |
| Operating Temperature | –30°C to +70°C |
| Operating Humidity | 0 to 99% RH |
In Application
