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The CS240DM is a best-in-class IoT-enabled smart sensor designed for accurate back-of-module temperature measurement in solar photovoltaic (PV) systems. Built around a rugged, surface-mountable platinum resistive thermometer (PRT), it delivers superior reliability and precision in demanding field environments. The sensor features Buraq Integrated Solutions’ latest precision analog-to-digital smart module, ensuring industry-leading accuracy for PV monitoring and performance analysis.
At the core of the CS240DM is a Pt-1000 Class A PRT encased in a durable aluminum disk. This construction protects the sensor—especially during conduit installation—and enhances heat transfer from the module surface while reducing convective heat loss. An adhesive backing ensures secure mounting, and for temperatures exceeding 70°C, Kapton tape is recommended for additional stability.
Best-in-class temperature measurement accuracy using advanced sensor technology
Modbus RTU (RS-485) digital communication for seamless integration
Precision Pt1000 Class A sensing element for stable, repeatable measurements
Complies with IEC 60751 / DIN EN 60751 international standards
Meets IEC 61724-1 PV System Performance Monitoring requirements
Optional NIST-traceable calibration certificate
Available with custom cable lengths for flexible installations
Rugged, field-proven design with over 4,000 deployments worldwide
| Sensor | Platinum resistive thermometer (PRT) |
| System Uncertainty | ±0.3°C |
| Disk Material | Anodized aluminum |
| Surge Protection | 1200 V isolation |
| Supply Voltage of the Sensor | 5 to 30 Vdc |
| Power Draw | 15 mA |
| Compliance Information |
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| Conforms with Electromagnetic Compatibility Directive | (EMC) |
| Conforms with the Restriction of Hazardous Substances Directive | (RoHS2) |
| Disk Diameter | 2.54 cm (1.0 in.) |
| Overall Probe Length | 6.35 cm (2.5 in.) |
| Overmolded Joint Dimensions | 5.72 x 1.12 x 1.47 cm (2.25 x 0.44 x 0.58 in.) |
| Weight | 90.7 g with 3.2 m cable (0.2 lb with 10.5 ft cable) |
| Protocol | Modbus RTU protocol (over RS-485) |
| Format | 8 data bits, 1 stop bit, even parity as default (user-configurable) |
| Baud Rate | 19,200 bps as default (user-configurable) |
| Modbus ID | Last two digits of serial number as default (user-configurable) |
| Description |
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| Jacket Material | Black semi-gloss PVC, UL VW-1 sunlight resistant for outdoor use |
| Agency Approvals |
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| Nominal Wire Diameter | 0.61 mm (0.024 in.) |
| Precision | 1000 ohm Class A platinum sensing element (Pt-1000) |
| Accuracy | ±(0.15 + 0.002T)°C |
| Temperature Coefficient of Resistance | TCR = 3850 ppm/K |
| Long-Term Stability | Maximum Ro drift 0.04% (after 1000 h at 400°C) |
| Operating Temperature Range | -40° to +135°C |
The integrated analog-to-digital module, built on the CR1000X platform, reduces self-heating and lead-wire resistance for stable, accurate measurements. Its surge protection, 1200 V isolation, and IP65 enclosure ensure reliable field performance, while differential data transmission and certified cabling provide noise-resistant communication over long distances.
The CS240DM provides precise back-of-module temperature data essential for PV performance modeling, irradiance evaluation, efficiency calculations, and long-term system monitoring. Its rugged design and smart digital architecture deliver the accuracy and reliability needed for modern solar energy applications.