It ensures a higher level of performance and an extended range of functions in the monitoring of indoor air quality. This highly accurate and reliable latest-generation measuring device is of great value to any company that wants to monitor the air quality in its production area, for example.

As a direct replacement for the popular 42280 series, the new 42280A features the same large three-section LCD display with simultaneous temperature, humidity, date and time display. Because the desire for continuous improvement is in the DNA of Extech, a subsidiary of Teledyne FLIR, the newly developed model also introduces a number of new features with real added value, such as the ability to create PDF reports or Excel spreadsheets by connecting the device (via the integrated USB interface) to a Windows PC after data acquisition.

Another important improvement is the increase of the internal memory to 48,000 points or readings (three times more than the previous model) to meet the requirements of extended monitoring and higher monitoring frequency. The Extech 42280A also introduces a max/min mode and a high/low display (Hi/Lo) on the screen. Here, the programmable and selectable data sampling rate provides visual and audible alarms according to the preset high and low limits.

Other features of the new Extech 42280A, which can be adapted to almost any situation, include a marking function that allows the user to read out the memory contents from a specific point in time without having to reprogram the log. Incidentally, the data remains securely stored in the logger at all times and can be protected by a password if required.

Extech is also launching a new model of the 42280A-NIST device variant. This model provides calibration to NIST standards* for indoor environments where accurate and reliable measurements need to be verified. Calibration reports that the user can download to a PC are also helpful.

Both the 42280A and the 42280A-NIST are important components of any indoor environmental monitoring system and measure in the temperature range from -20 to +70°C and in the humidity range from 0 to 100%. The devices are very compact with dimensions of 120.7 x 88.9 x 38.1 mm and weigh only 163 grams. Depending on requirements, the user can choose between wall, table or tripod mounting. Salt bottles for calibrating the relative humidity are available as optional accessories (with concentrations of 33% and 75%).

Extech supplies the 42280A and 42280A-NIST complete with Windows-compatible software, USB cable, universal power adapter, four AA batteries, user manual and two-year warranty. The meters are shipped fully tested and calibrated and, with proper use, will provide years of reliable service.