nattended weather stations need data that reaches the user, not a logger that has to be collected in the field. With integrated 4G/3G/GSM(2G)/GPRS transmission, this logger sends measurements by e-mail, FTP or HTTP server and supports remote control through SMS commands or TCP/IP connection.
Built for expandable sensor networks, it connects RS485 Modbus-RTU slave sensors as a Master and adds a voltage-free contact input for a rain gauge. Depending on the connected sensors, it can monitor temperature, humidity, atmospheric pressure, solar radiation, wind speed and direction, and rainfall quantity. Measuring and logging intervals from 1 s to 1 hour help match the recording strategy to the site.
The compact polycarbonate enclosure supports outdoor installation with ingress protection (IP67). A 7…30 Vdc supply, low current draw below 3 mA during measurement without cellular activity, and switched sensor power support mains-based or solar-powered systems.
The logger operates as Master for connected Modbus-RTU slave sensors. A proprietary protocol can also be used with the HD2003 anemometer.
A voltage-free contact input connects a rain gauge. The contact can be configured as normally closed or normally open.
The device calculates rainfall rate in mm/h and the rainfall amount in the last day, with a configurable compensation curve based on rainfall rate.
Internal memory supports circular management or stop logging when full, with 120,000 to 424,000 samples depending on detected quantities.
Each detected quantity can use high and low alarm thresholds with configurable hysteresis and delay. Alarms can trigger the internal buzzer, e-mail or SMS.
A switched power supply output energizes external sensors only when measurements must be detected.
HD35AP-S software configures measurements, alarms, logging and transmission intervals, displays real-time values and downloads data to a database.
HD35AP-CFR21 adds functions aligned with FDA 21 CFR part 11 recommendations, including audit trail and controlled user access.
