Munters DOL 53 Ammonia Sensor
Munters DOL 53 is positioned as a rugged, industrial-grade duct-mounted NH3 sensor built to integrate tightly with commercial ventilation controllers; it stands out for proven reliability and low false-alarm rates in harsh, humid barn environments. Compared with the other sensors in this list, Munters’ long history in climate control and strong global service network give it a technical and operational advantage for larger operations that value uptime and predictable lifecycle costs. For barn ventilation controls this model is best when buyers prioritize long-term stability and seamless integration with established HVAC/ventilation systems.
Rapid response
Rugged design
Rapid response
Rugged design
Review Summary
"Users commonly report the Munters DOL 53 as reliable and accurate with stable long-term readings and straightforward integration into ventilation controls, though it is considered premium-priced and requires periodic calibration/maintenance."
Ammonia whisperer
Duct-mounted electrochemical NH3 sensor designed for continuous livestock ventilation control.
Ammonia whisperer
Duct-mounted electrochemical NH3 sensor designed for continuous livestock ventilation control.
Increased Safety & Security
Time-Saving Convenience
Munters DOL 53 is positioned as a rugged, industrial-grade duct-mounted NH3 sensor built to integrate tightly with commercial ventilation controllers; it stands out for proven reliability and low false-alarm rates in harsh, humid barn environments. Compared with the other sensors in this list, Munters’ long history in climate control and strong global service network give it a technical and operational advantage for larger operations that value uptime and predictable lifecycle costs. For barn ventilation controls this model is best when buyers prioritize long-term stability and seamless integration with established HVAC/ventilation systems.
Rapid response
Rugged design
Ammonia whisperer
Duct-mounted electrochemical NH3 sensor designed for continuous livestock ventilation control.
Provides industry-standard analog output (4–20 mA) for direct integration with controllers and alarm systems.
Rapid response
Rugged design
Ammonia whisperer
Duct-mounted electrochemical NH3 sensor designed for continuous livestock ventilation control.
Provides industry-standard analog output (4–20 mA) for direct integration with controllers and alarm systems.
$700-1,200 CAD
Rotem RAS-31 NH3 Duct Sensor
The Rotem RAS-31 is a purpose-built poultry industry duct sensor that emphasizes straightforward installation and cost-effective monitoring for mid-sized farms; it is often chosen for its competitive price point and simple compatibility with common farm controllers. Relative to the higher-end industrial units on this list, RAS-31 offers a more budget-friendly entry while still delivering the basic response speed and accuracy needed for ventilation control, making it attractive where capital expenditure and ease-of-use are primary concerns. Its value proposition is strongest for producers who need reliable NH3 detection without the premium of advanced connectivity or extended warranty programs.
High accuracy
Simple calibration
High accuracy
Simple calibration
Review Summary
"The Rotem RAS-31 is praised for easy installation and good short-term accuracy in duct mounting; some users note gradual sensor drift over long deployments and the need for occasional recalibration."
Poultry-pro nose
Specifically designed for poultry houses and duct installation with easy mounting hardware.
Poultry-pro nose
Specifically designed for poultry houses and duct installation with easy mounting hardware.
Increased Safety & Security
Skill Development & Mastery
The Rotem RAS-31 is a purpose-built poultry industry duct sensor that emphasizes straightforward installation and cost-effective monitoring for mid-sized farms; it is often chosen for its competitive price point and simple compatibility with common farm controllers. Relative to the higher-end industrial units on this list, RAS-31 offers a more budget-friendly entry while still delivering the basic response speed and accuracy needed for ventilation control, making it attractive where capital expenditure and ease-of-use are primary concerns. Its value proposition is strongest for producers who need reliable NH3 detection without the premium of advanced connectivity or extended warranty programs.
High accuracy
Simple calibration
Poultry-pro nose
Specifically designed for poultry houses and duct installation with easy mounting hardware.
Commonly offers 4–20 mA output and simple wiring for integration into Rotem/Amador ventilation systems.
High accuracy
Simple calibration
Poultry-pro nose
Specifically designed for poultry houses and duct installation with easy mounting hardware.
Commonly offers 4–20 mA output and simple wiring for integration into Rotem/Amador ventilation systems.
$400-800 CAD
CTB Chore-Time AIRSENSE 2000
CTB Chore-Time AIRSENSE 2000 is engineered specifically for livestock housing and integrates tightly with Chore-Time environmental control systems to provide consistent duct-mounted ammonia monitoring and alarm functions. Compared with general industrial sensors on this list, AIRSENSE 2000 trades some high-end industrial features for farm-oriented simplicity, local tech support, and predictable replacement intervals, lowering the total cost of ownership for farms already using CTB control platforms. It is a strong choice when the priority is straightforward integration with barn management equipment and minimal training for on-farm staff.
Integrated control
Durable build
Integrated control
Durable build
Review Summary
"The CTB Chore‑Time AIRSENSE 2000 is viewed as a robust, well-integrated option for poultry houses with generally dependable performance, but several users report sensor drift and the need for periodic replacement/calibration."
Barn-friendly brain
Duct-mounted ammonia sensor optimized for cost-effective barn ventilation control applications.
Barn-friendly brain
Duct-mounted ammonia sensor optimized for cost-effective barn ventilation control applications.
Increased Safety & Security
Time-Saving Convenience
CTB Chore-Time AIRSENSE 2000 is engineered specifically for livestock housing and integrates tightly with Chore-Time environmental control systems to provide consistent duct-mounted ammonia monitoring and alarm functions. Compared with general industrial sensors on this list, AIRSENSE 2000 trades some high-end industrial features for farm-oriented simplicity, local tech support, and predictable replacement intervals, lowering the total cost of ownership for farms already using CTB control platforms. It is a strong choice when the priority is straightforward integration with barn management equipment and minimal training for on-farm staff.
Integrated control
Durable build
Barn-friendly brain
Duct-mounted ammonia sensor optimized for cost-effective barn ventilation control applications.
Provides a standard analog signal (4–20 mA) for use with a wide range of controllers and alarm modules.
Integrated control
Durable build
Barn-friendly brain
Duct-mounted ammonia sensor optimized for cost-effective barn ventilation control applications.
Provides a standard analog signal (4–20 mA) for use with a wide range of controllers and alarm modules.
$350-700 CAD
Fancom FSA-112 Gas Sensor
The Fancom FSA-112 brings advanced connectivity and configurable outputs to duct-mounted NH3 sensing, making it a market leader for growers who want precise control loops, network integration, and data logging for ventilation optimization. Technically, it often outperforms simpler farm-branded sensors on responsiveness and digital interfacing, and financially it can deliver ROI through tighter ventilation control and reduced energy and medication costs, though it commands a higher upfront price. For barn ventilation controls where analytics-driven environmental management matters, the FSA-112 is the choice for longer-term control and scalability.
Compact footprint
Fast recovery
Compact footprint
Fast recovery
Review Summary
"Owners say the Fancom FSA‑112 pairs well with Fancom controls and delivers accurate ammonia readings under normal conditions, with occasional variability reported in very harsh environments and the usual maintenance needs."
Vent-savvy veteran
Designed to integrate seamlessly with Fancom and other smart ventilation control systems via analog outputs.
Vent-savvy veteran
Designed to integrate seamlessly with Fancom and other smart ventilation control systems via analog outputs.
Increased Safety & Security
Time-Saving Convenience
The Fancom FSA-112 brings advanced connectivity and configurable outputs to duct-mounted NH3 sensing, making it a market leader for growers who want precise control loops, network integration, and data logging for ventilation optimization. Technically, it often outperforms simpler farm-branded sensors on responsiveness and digital interfacing, and financially it can deliver ROI through tighter ventilation control and reduced energy and medication costs, though it commands a higher upfront price. For barn ventilation controls where analytics-driven environmental management matters, the FSA-112 is the choice for longer-term control and scalability.
Compact footprint
Fast recovery
Vent-savvy veteran
Designed to integrate seamlessly with Fancom and other smart ventilation control systems via analog outputs.
Robust duct housing with features to reduce drift and improve long-term stability in agricultural settings.
Compact footprint
Fast recovery
Vent-savvy veteran
Designed to integrate seamlessly with Fancom and other smart ventilation control systems via analog outputs.
Robust duct housing with features to reduce drift and improve long-term stability in agricultural settings.
$600-1,200 CAD
Big Dutchman DOL 2400 NH3 Sensor
Big Dutchman’s DOL 2400 NH3 sensor is aimed at producers seeking premium integration with Big Dutchman automation and a durable sensor designed for continuous duct mounting in commercial barns. Compared to the other sensors listed, the DOL 2400 typically offers the deepest system-level integration and farm support, which can reduce commissioning time and service costs for users of Big Dutchman equipment, though it may carry a higher initial capital cost. It is best for operations that prioritize turnkey compatibility with Big Dutchman control systems and want a vendor-backed package for ventilation safety and compliance.
Precision sensing
Long lifespan
Precision sensing
Long lifespan
Review Summary
"The Big Dutchman DOL 2400 is regarded as a durable, accurate NH3 duct sensor with strong long-term performance and good manufacturer support; it is seen as higher cost but reliable for continuous ventilation control."
Dutch reliability wink
High-sensitivity duct-mounted ammonia sensor tailored for large-scale barn and tunnel ventilation systems.
Dutch reliability wink
High-sensitivity duct-mounted ammonia sensor tailored for large-scale barn and tunnel ventilation systems.
Increased Safety & Security
Time-Saving Convenience
Skill Development & Mastery
Big Dutchman’s DOL 2400 NH3 sensor is aimed at producers seeking premium integration with Big Dutchman automation and a durable sensor designed for continuous duct mounting in commercial barns. Compared to the other sensors listed, the DOL 2400 typically offers the deepest system-level integration and farm support, which can reduce commissioning time and service costs for users of Big Dutchman equipment, though it may carry a higher initial capital cost. It is best for operations that prioritize turnkey compatibility with Big Dutchman control systems and want a vendor-backed package for ventilation safety and compliance.
Precision sensing
Long lifespan
Dutch reliability wink
High-sensitivity duct-mounted ammonia sensor tailored for large-scale barn and tunnel ventilation systems.
Engineered for precise readings with temperature compensation and reliable 4–20 mA communications.
Precision sensing
Long lifespan
Dutch reliability wink
High-sensitivity duct-mounted ammonia sensor tailored for large-scale barn and tunnel ventilation systems.
Engineered for precise readings with temperature compensation and reliable 4–20 mA communications.
$900-1,500 CAD