Additionally, all of the systems are susceptible to failure. Each system we used experienced some data loss from a variety of sources, such as bad batteries, insects in the equipment, problems with software, and difficulty operating the unit. To get the most out of the electronic units, a computer is necessary. If you don't have a phone line to connect to the electronic units, you will need a portable computer to take into the field to collect the data. The shortcoming of a manual system is the lack of hourly information that is necessary for some pest management.
Manual systems require daily readings of thermometers and rain gauges at the same time each day.
Commitment and time is required to operate manual weather systems. Hygrothermographs eliminate the need for daily readings. They are reliable and accurate when regularly calibrated. The charts must be changed once a week, and information must be retrieved manually from the charts. These instruments are becoming more expensive.