Pt1000 temperature sensor 3S-MT-PT1000-MB

self-adhesiveRS-485Modbus RTU

Product overview
The module temperature sensor measures PV module backside temperature in °C using a PT1000 probe placed between the module backsheet and an EVA layer. A PT1000-to-Modbus transducer converts the sensor signal to Modbus RTU for integration with dataloggers and PLCs via RS485.

Working principle
This device is a temperature transmitter using a PT1000 sensing element. The PT1000 signal is converted to Modbus RTU and transmitted over RS485, enabling standardized digital monitoring of PV module rear-side temperature for performance analysis and control systems.

Technical specifications

• Item code: 3S-MT-PT1000-MB
• Sensor type: PT1000 (Class A)
• Measuring range: -40°C to +85°C
• Accuracy: ±0.1°C
• Resolution: 0.1°C
• Data output: RS485 up to 38400 Baud
• Communication protocol: Modbus RTU
• Power supply: 12–30 V DC
• Power consumption: 15 mA @ 24 V DC
• Electrical connection: 1.2 m 2x2x0.22 mm² (24 AWG) LI2YC11Y-TP PUR cable and 2 m 3x2x0.22 mm² (24 AWG) LI2YC11Y-TP PUR cable, UV and weather resistant
• Operating temperature range: -40°C to +85°C
• Box dimensions: 80 mm x 82 mm x 55 mm (W x L x H)
• Sensor cover dimensions: Ø 33 mm x 3.5 mm (Plastic); Ø 35 mm x 2 mm (EVA)
• Weight: 280 g
• IP rating: IP67
• Box material: ABS
• Sensor cover: Laminated backsheet (EVA – Tedlar) / ABS plastic injection
• Mounting method: 3M® tape to back of module
• Standard: Class A according to IEC 60751:2022 and IEC 61724-1:2021

Installation
Install the sensor following IEC 61724-1:2021: place the probe at the centre of a cell near the module midpoint, avoiding cell boundaries. Ensure the mounting area is dry and clean; residual dew or contaminants can affect adhesion and measurement accuracy.

Advantages

• PR calculation: Supplies accurate module temperature for reliable Performance Ratio (PR) computations.
• Overheating protection: Real-time temperature data enable control systems to detect and mitigate overheating events.
• Weather adaptability: Supports dynamic system adjustments to optimise energy yield under changing environmental conditions.

Why SEVEN Sensor Solutions
SEVEN Sensor Solutions products use reliable components and a sensor design that mimics PV module backside structure to ensure comparable heat-transfer behaviour and representative temperature measurements. The 3S-MT-PT1000-MB meets IEC standards and provides high resolution and low uncertainty.

FAQ (selected)

• Class: All 3S-MT-PT1000-MB units are Class A according to IEC 60751:2022 and IEC 61724-1:2021.
• Warranty: 2 years.
• Price: Indicative range 110–195 EUR.
• Delivery times: Small orders approx. 1–2 weeks; bulk orders approx. 6–8 weeks.
• Cables: Supplied with 1.2 m 2x2x0.22 mm² and 2 m 3x2x0.22 mm² LI2YC11Y-TP PUR cables (UV and weather resistant). Other lengths available on request.