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Product Name	4-20mA CO2 Sensor for Livestock Houses
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Product Overview	The 4-20mA CO2 Sensor for Livestock Houses is designed for continuous carbon dioxide monitoring in commercial pig houses, poultry houses, breeding facilities, and other controlled agricultural environments. The sensor converts measured CO2 concentration into a standard 4-20mA current-loop signal for connection to livestock climate controllers, ventilation control panels, PLC systems, data acquisition equipment, and farm management systems. By continuously monitoring indoor CO2 concentration, the sensor helps farm operators evaluate ventilation performance and maintain appropriate air exchange in animal production buildings. When connected to a compatible climate controller, CO2 data can be used as part of an automatic ventilation strategy together with temperature, humidity, pressure, and other environmental parameters. Its compact enclosure, straightforward wiring, diagnostic indication, and standard analog signal make it suitable for new livestock construction as well as renovation and controller-upgrade projects.
Key Features	Continuous CO2 concentration monitoring for livestock and agricultural buildings. Standard 4-20mA current-loop output for stable controller integration. Suitable for commercial pig houses, poultry houses, breeding barns, and agricultural facilities. Designed for connection to ventilation and climate-control systems. Impact-resistant enclosed housing for indoor agricultural applications. Diagnostic LEDs support installation, commissioning, and troubleshooting. Quick-open enclosure simplifies access during installation and servicing. Long signal transmission capability supports large livestock-house layouts. Easy to integrate with compatible PLC, climate controller, and farm automation systems. Suitable for both new livestock projects and existing house upgrades.
Structural Components	The sensor assembly typically includes a protective enclosure, CO2 sensing module, ventilation grille, signal-processing electronics, 4-20mA current-loop circuitry, diagnostic indicators, wiring terminals, cable connector, and mounting points. The front sensing grille allows surrounding air to reach the measuring element while the enclosure protects the electronics from mechanical impact and normal indoor farm operating conditions. Electrical terminals provide connections for power supply, signal output, signal common, and controller wiring. Cable length, mounting arrangement, and controller interface can be configured according to project requirements.
Working Principle / Structural Principle	The sensor continuously measures carbon dioxide concentration in the surrounding livestock-house air. Internal electronics process the CO2 measurement and generate a proportional 4-20mA current signal. The current-loop signal is transmitted to a compatible climate controller or analog input module. The controller compares the measured CO2 concentration with user-defined control parameters and can use the information to adjust ventilation capacity, activate alarms, or record environmental data. The 4-20mA interface is particularly suitable for agricultural engineering projects because current-loop signals can provide reliable transmission over comparatively long cable distances when correctly installed.
Technical Specifications	Measured Parameter Carbon dioxide (CO2) Reference Measuring Range 0-5000 ppm Signal Output 4-20mA current loop Reference Accuracy Up to ±3% according to the referenced product configuration Power Supply 12 VDC for the referenced configuration Reference Dimensions Approximately 112 × 73 × 205 mm Operating Temperature 10°C to 70°C for the referenced configuration Relative Humidity 0-95% RH for the referenced configuration Maximum Reference Cable Length Up to 300 m when installed according to system requirements Reference Minimum Wire Size 22 AWG Installation Environment Indoor livestock and agricultural buildings Controller Integration Compatible 4-20mA analog input Project Configuration Customizable according to project requirements
Applications	Commercial pig finishing houses. Sow, farrowing, gestation, and nursery buildings. Broiler, layer, breeder, and pullet houses. Mechanically ventilated livestock facilities. Livestock-house minimum ventilation control. Air-quality and environmental monitoring systems. Livestock climate controllers and PLC-based automation systems. New steel structure livestock-house construction. Existing farm ventilation renovation projects. Centralized livestock environmental monitoring networks.
Customization Options	SHEWUYOU can configure CO2 sensing solutions according to livestock species, building dimensions, ventilation layout, steel structure design, controller type, monitoring-point quantity, cable routing, and local farm conditions. Customization options may include cable length, mounting accessories, controller interface arrangement, sensor quantity, installation position, control-panel integration, alarm strategy, and project wiring configuration. Alternative measurement ranges, output configurations, and system integration solutions are available upon request. Final selection can be designed according to local climate and farm conditions.
Installation & Maintenance	Install the sensor at a representative location where measured air reflects normal livestock-house conditions. Avoid positions directly exposed to fresh-air jets, exhaust outlets, heaters, cooling equipment, or other localized sources that could produce misleading readings. Connect the sensor to the appropriate DC power supply and a compatible 4-20mA analog input according to the controller wiring diagram. Shielding and grounding should follow the controller manufacturer's electrical requirements, especially on long signal cable runs. The sensor grille should remain clean and unobstructed. The referenced sensor is intended for indoor use and should be protected from water and cleaning fluids. Remove or adequately protect the sensor before livestock-house pressure washing and disinfection. Periodically inspect wiring, connectors, enclosure condition, sensing openings, diagnostic indicators, and controller readings as part of routine farm maintenance.
Project Cases	The 4-20mA CO2 Sensor can be used in new-build and retrofit livestock projects requiring reliable analog environmental monitoring. Typical configurations include pig-house minimum ventilation systems, poultry climate-control projects, centralized farm monitoring panels, and steel structure livestock buildings equipped with programmable environmental controllers. In large commercial farms, multiple CO2 sensors can be distributed across separate houses or ventilation zones and connected to controller analog inputs. Sensor quantity and installation location should be determined according to house dimensions, ventilation zones, stocking arrangement, and project control strategy.
Product FAQ	Q1: Why use a 4-20mA output for livestock-house CO2 monitoring? A 4-20mA current-loop signal is widely used in industrial and agricultural control systems because it provides a standardized analog interface and is suitable for comparatively long cable runs. Q2: Can this sensor control livestock-house ventilation? The sensor provides the CO2 measurement signal. When connected to a compatible climate controller, the controller can use the signal to increase or decrease ventilation according to programmed CO2 limits. Q3: Is it suitable for pig and poultry houses? Yes. The sensor is suitable for environmental monitoring in commercial pig, poultry, and other indoor agricultural buildings when installed within its specified operating conditions. Q4: Can the signal be transmitted over a long distance? Yes. The referenced configuration supports cable runs of up to 300 meters when correct cable size, controller input, wiring, grounding, and installation practices are used. Q5: Can it connect to an existing farm controller? Yes, provided the controller has a compatible 4-20mA analog input and the electrical specifications match the selected sensor. Q6: Can the sensor be pressure-washed? The referenced configuration should not be exposed directly to water or cleaning fluids. The sensor should be removed or properly protected before pressure washing and livestock-house disinfection. Q7: Can cable length and mounting accessories be customized? Yes. Cable routing, mounting accessories, wiring arrangements, and related project components can be configured according to project requirements.
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