Ammonia (NH3) is one the most important environmental factors to monitor poultry production. Even relatively low concentrations can affect animal welfare and overall performance. Thus, producers should invest in ammonia monitoring rather than relying on manual checks or periodic measurements. Studies* have shown that high ammonia concentrations in poultry production results in a high FCR, reduced gain, and low animal welfare.

DOL 51 and DOL 53 are examples of electrochemical ammonia sensors designed specifically for the demanding conditions found in livestock houses.

How Does An Electrochemical Ammonia Sensor Work?

Agricultural environments often expose sensors to dust, humidity, and corrosive gases, making sensor durability and measurement stability essential. Electrochemical ammonia sensors measure NH3 concentrations by detecting chemical reactions between ammonia molecules and the sensor’s active element.

The resulting electrical signal is converted into a concentration value that can be transmitted to climate control systems. To maintain measurement accuracy over time, sensor performance depends on factors such as temperature compensation, calibration stability, and protection against environmental contamination.

Read more: Ammonia Sensors for Poultry Houses

Advantages of Ammonia Sensors

Electrochemical sensors have become one the most widely used technology for continuous monitoring in livestock production.

Key advantages include: 

• High sensitivity at low ammonia concentrations
• Fast response times
• Reliable detection of ammonia build-up
• Less installation costs
• Easy integration
• Low power consumption
• Well suited for automated ventilation control systems

For poultry producers, these advantages are particularly important because ammonia levels can change rapidly due to litter quality, humidity, stocking density, and ventilation performance.

Disadvantages of Electrochemical Sensors

Like any technology, electrochemical sensors also have limitations. They typically have a shorter service life because the sensing element gradually degrades as it reacts with ammonia. As a result, sensor elements require periodic replacement to maintain measurement accuracy.

Potential challenges include:

• Exposure to severe environmental conditions can reduce lifespan
• Dust accumulation can affect performance if sensors are not properly protected
• Sensor elements eventually require replacement
• Require more frequent maintenance

Many ammonia sensors used in agriculture were originally developed for industrial applications. While the sensors can provide accurate measurements, they may not be optimized for continuous operation in poultry houses, where high dust levels, humidity, and corrosive conditions place additional demands on sensor durability and long-term stability.