Metabolism is the most fundamental characteristic of life, with photosynthesis being the most important feature of plants, and respiratory metabolism being the most important feature of animals as heterotrophic organisms; The former (plants) absorbs CO₂And using solar energy to synthesize organic compounds (hydrocarbons such as starch) while releasing oxygen, the latter (animals) ingest organic compounds synthesized by plants while inhaling oxygen, then digest and decompose them, and exhale CO through respiration₂Usually, animals are CO treated for a certain period of time₂With O₂The ratio of consumption is called the respiratory quotient (RQ), which varies within a certain range depending on the composition of the animal's food. It can reflect which type of nutrient is the main source of energy for the animal at that time. If the main component of the food is sugar, the RQ is close to 1, and if the main component of the food is fat, the RQ is close to 0.7. By measuring animal CO₂The exhaled volume and oxygen consumption can be used to determine the respiratory metabolism of animals.

Brief introduction

FOXBOXPortable terrestrial animal respiratory measurement system can be used for respiratory measurement of small insects (such as flies, mosquitoes, cockroaches, etc.), lizards, and even large rodents (such as field mice, rats, etc.), as well as airflow control CO₂And O₂The measurement analysis, data collection and storage are all perfectly integrated in a portable box.

IISpecific performance indicators:

1.Gas analyzer type: Oxygen: Fuel cell technology; Carbon dioxide: colorless dispersive dual wavelength infrared gas analyzer

2.Range: O2：0-100%, CO2：0-5%

3.Accuracy: O2:0.1%，CO2: 1%

4.resolving power: O2:0.001%, CO2: 0.0001% -0.01% (depending on concentration range)

5.Drift: O2:<0.02% per hour at constant temperature; CO2: < 0.001% per hour;

6.MA-10Methane analyzer (optional, external): Dual wavelength infrared technology, pressure compensation, measurement range 0-10%, resolution 1ppm, accuracy 1%, airflow 5-2000ml/minute, noise less than 3ppm, 24-hour drift less than 0.01%, with two lines of text digital LCD display screen, backlight, can display CH4 content and pressure simultaneously, 16 bit resolution, digital filtering (noise); Size 30x25x10cm, weight approximately 4.5kg

7.Moisture measurement unit RH-300 (optional, external): measurement range 0.2% -100%, resolution 0.001%

8.Airflow generation controller (optional, external): used for respiratory measurement of larger animals, including an airflow pump and flow meter, with a flow rate of 250ml/min-5 liters/minute;

9.Insect glass breathing chamber: diameter 20mm, length 40mm, ultra-low carbon dioxide and water vapor absorption or permeability, flame polished, Viton ® Ultra low permeability gasket; Other breathing rooms can be customized

10.Gas sampling unit: including a pump, needle valve (controlling the airflow in and out of the pump body), and gas flow meter (0-2000ml/m); Diaphragm pump, roller motor, flow rate 10-1700mL/min; Thermal bridge flowmeter, resolution 0.1mL/min (flow rate 0-99.9mL/min), 1mL/minWhen it is greater than 100mL/min, the accuracy is 2%; Analog output 12 bits

11.Airflow control: Microelectronic thermal feedback system (true scientific research no longer uses rotor flow meters, as glass tubes are easily affected by surrounding temperature and pressure, so papers using rotor flow meters cannot be published in international journals), airflow control actually connects the airflow pump and flow meter through a precision feedback loop system (microcomputer control), while providing high-precision needle valves;

12.Environmental temperature sensor (optional): Thermistor principle, measurement range -5-60 ℃, resolution 0.001 ℃, absolute accuracy 0.2 ℃, BNC connection, probe diameter 2.5mm;

13.Display: 4-line LCD display, real-time synchronized display of CO2 concentration, O2 concentration, flow rate, etc;

14.Signal input: 2 BNC ports, can be connected to analog voltage signal sensors or temperature sensors

15.Signal output: BNC connector, analog signal output, O2, CO2, And 2 customizations

16.Digital output: RS-232

17.Built in memory: 8190 data points.

18.Data recording interval: 0.1 seconds to 1 hour, user-defined

19.Software: Windows version software, capable of real-time display of data curves, data downloads, data analysis, etc

20.Power supply: 12-15VDC, 50-500mA, equipped with AC adapter

21.Operating temperature: 0 to 50 ℃, no condensation

22.Size: 31cm × 18cm × 31cm

23.Weight: 5kg

There are also respiratory metabolism measurement systems available for small, medium, and large animals.

3、 Origin: United States