The Rotronic HP23-AW-A is a multifunctional, handheld water activity indicator designed for precision spot-check measurements and data logging. It is an essential tool for quality control in industries where the water activity of products like food, pharmaceuticals, and cosmetics directly impacts stability, shelf life, and microbial growth .

The instrument measures water activity (0.00 to 1.00 aw), relative humidity (0 to 100 %RH), and temperature, offering comprehensive analysis of moisture-related parameters. It achieves an industry-leading accuracy of ±0.008 aw for water activity and ±0.8 %RH for humidity .

The HP23-AW-A features two probe inputs compatible with interchangeable digital HygroClip 2 probes or analog probes, providing flexibility for various measurement tasks . It incorporates an AwQuick mode, which delivers accurate water activity readings for most products in approximately 4-6 minutes. The device includes a large 3-line alphanumeric LCD with trend indicators and a battery power monitor for convenient field use. An internal memory can store up to 10,000 values in logging mode or 8 x 250 values in capture mode .

This model is available in convenient kit configurations. The HP23-AW-A-Set-14 includes a HC2-AW probe, WP-14-S sample holder, and 100 PS-14 (14mm) disposable cups. The HP23-AW-A-Set-40 includes the probe, a WP40S dual-size holder, and 100 PS-40 (40mm) disposable cups. Both kits come with a complete set of humidity standards (EA10/35/50/80) and a durable AC1124 carrying case, providing everything needed for immediate use and field calibration .