The HP21 is a highly accurate handheld indicator that displays relative humidity, temperature and dew or frost point temperature. The HP21 is perfect for spot checking HVAC installations, manufacturing or storage areas and any ambient air measurement within the temperature range of -10 to 60°C (14 to 140 °F). The HP21 is designed to meet a wide range of user requirements from the most basic applications to the most demanding applications.

The HP21 indicator offers an extensive set of settings and functions that can be configured and enabled by the user with the ROTRONIC HW4 software. In spite of its high end design, the HP21 is ideal even as a simple humidity and temperature indicator.

<strong>Applications</strong>
Mobile inspection and random tests in HVAC, the pharmaceutical industry and building management systems

<strong>Features</strong>
<ul>
 	<li>Range of application -10…60 °C / 0…100 %rh</li>
 	<li>Accuracy at 23°C ±5 K: 1 %rh, 0.2 K</li>
 	<li>Adjusted at 23 °C and 10, 35, 80 %rh</li>
 	<li>Service interface (UART)</li>
 	<li>Calculation of dew and frost point</li>
</ul>
<strong>Applications</strong>
<ul>
 	<li>Food</li>
 	<li>Meteorological</li>
 	<li>Paper</li>
 	<li>Pharmaceutical</li>
</ul>