Hello, thank you for your inquiry.

The chemical thermometer with a range of 0 °C to 50 °C (reference 517.050-L) is an economical model, without certification, and with intervals of 1 °C. Due to its characteristics, we cannot guarantee a specific accuracy.
Currently, we do not have higher-quality or certified models for this temperature range.

We are at your disposal for any further inquiries or to help you explore other alternatives within our range.

Best regards,