The S120 PID oil vapour monitor from SUTO-iTEC GmbH has been justifiably popular for testing critical compressed air systems for residual oil. This year, the SUTO engineers have added their -100degC to +20degC dew point sensor as an option for this unit, enabling it to monitor humidity as well as oil for portable or continuous duties. The S120 can output both measurements through Modbus/RTU or for units with the optional touchscreen display, log them to USB for later analysis. For further details on this development, please follow the link below or ask us directly.