Nitric acid is a solution of nitrogen dioxide in water:

HNO3 + aq  H₃O⁺ + NO2⁻

Some points of use in the industry

• in fertilizer industry
• In explosives manufacturing

Technology

The technology of Ultrasonic Density is explained here.

Our probes

Arenal offers a variety of probes to measure HNO3 concentrations online:

1. If a general indication of the concentration is required, our torroidal (electrodeless) conductivity sensor is suitable for the full range 0-68 wt%, except in the range of 27..33 wt% where the curve flattens out. We can offer PP, PVC, PVDF torroidal probes. Interested? Fill in the questionnaire and request the QP025-TCP-INL probe.
2. If highest accuracy is required, the ultrasonic spectroscopy sensor is the best choice. The speed of sound graph gives a similar signal as the the conductivity, and is more accurate, which makes the sensor ideal for use in a broad range and for determining its concentrations on 4 digits over the full range. The materials used are PP or PVDF and zirconiumoxide (ZrO2): only the extractive analysis embodiment is possible at the moment.

Embodiments

When choosing ultrasonic spectroscopy sensors, we herewith help you selecting the correct products. Arenal offers solutions for applications with a variety of embodiments. Actually in most cases only the probe size, body shape, body material and sensor material changes, while the transmitter and Analysers keeps the same.