SSIThe experimental animal energy metabolism measurement system is used to accurately measure the respiratory metabolism of various small experimental animals such as rats and mice, including exhaled carbon dioxide, oxygen consumption, water vapor, etc., and calculate and analyze animal energy metabolism and respiratory quotient. It is widely used in genetics, medical experiments, pest control, preventive medicine research experiments, animal physiological ecology, ecotoxicology, animal nutrition, etc. The system consists of a carbon dioxide analyzer, an oxygen analyzer, a multi-channel gas path converter, an airflow controller, a data collector and program software, a metabolic cage, and an implanted animal physiological and ecological monitoring recorder. According to the research content and budget, an 8-channel measurement system can be customized (which can simultaneously measure the respiratory metabolism of 7 animals, with the other channel being the baseline channel) or even more channel measurement systems, or CO can be measured simultaneously₂、 O₂、 RQ and H₂O， Alternatively, only CO measurement can be selected according to requirements₂Or O₂The measurement system.

Main functional features:

1.Modular structure with high scalability and diverse configuration solutions:

a)Standard configuration includes an 8-channel system (7 working channels, 1 baseline channel), with optional 4-channel, 16 channel, or more channels

b)Only CO2 analyzer or O2 analyzer can be selected, and CO2 analyzer, O2 analyzer, H2O analyzer, etc. can also be selected simultaneously

c)Can simultaneously monitor physiological indicators such as body temperature and heart rate of experimental animals

d)Optional activity monitoring unit can be used to synchronously monitor animal activities and analyze the relationship between animal activities and energy metabolism

e) Optional gas control system to regulate and control the concentration of O2 or CO2 entering the breathing chamber

2.High precision and sensitivity, it is currently the most widely published professional instrument for animal energy metabolism in the international academic community

3.High precision CO2 analyzer and O2 analyzer, temperature and pressure compensation, resolution up to 1ppm, optional water vapor analyzer, etc

4.Open metabolic cage and suction measurement technology can measure animals for a long time without emergency stress

5.Optional infrared thermal imaging unit for measuring and analyzing the temperature distribution of experimental animals

Technical indicators:

1.Oxygen analysis measurement: Oxygen measurement range 0-100%, resolution 0.0001%, accuracy better than 0.1%, response time less than 7 seconds, 24-hour drift less than 0.01%, 20 minute noise less than 0.002% pk pk; Temperature and pressure compensation, 4-channel analog output, 16 bit resolution; Digital filtering (noise) adjustable from 0-50 seconds, amplification of 0.2 seconds, built-in A/D converter resolution of 24 bits; Can simultaneously measure temperature (measurement range 0-60 ℃, resolution 0.001 ℃) and air pressure (measurement range 30-110kPa, resolution 0.0001kPa); Equipped with a two-line text digital LCD display screen, backlit, capable of displaying both oxygen content and air pressure simultaneously; Size 33x25x10cm, weight approximately 4.5kg. There is also a dual channel high-precision oxygen analysis measuring instrument as an alternative.

2.Carbon dioxide analysis and measurement: Dual wavelength non dispersive infrared technology, measurement range 0-5% or 0-15% two-stage selection (two-way), built-in data acquisition system, real-time measurement, response time less than 1 second, resolution better than 0.0001% or 1ppm (up to 0.1ppm), accuracy 1%, recommended air flow 5-2000ml/minute, noise less than 2ppm, 24-hour drift less than 0.002%, temperature compensation through software, sampling frequency 10Hz; with two lines of text digital LCD display screen, backlight, can display CO simultaneously₂Content and pressure; 4-channel analog output, 16 bit resolution, with digital filtering (noise); Size 33x25x10cm, weight approximately 4.5kg

3.Water vapor measuring instrument (optional): measurement range of 0.2% -100% (relative humidity), resolution of 0.001% (relative humidity), dew point temperature of -40~40 ℃, resolution of 0.002 ℃ (dew point temperature), water vapor density of 0-10 µ g/ml, resolution of 0.0001 µ g/ml, water vapor pressure of 0-20kPa, resolution of 0.01Pa; analog output of 16 bits, recommended airflow speed of 5-2000ml/min, with two lines of text digital LCD display screen, backlight, can display water vapor content and temperature simultaneously

4.Gas secondary 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, maximum flow rate 2-4L/min; Thermal bridge flowmeter with a resolution of 1ml/min and an accuracy of 2%; Analog output of 12 bits; Weight approximately 2kg

5.Gas path converter: supports automatic or manual switching of 8 gas path channels (including one Baseline channel); Multiple units can be combined into 16 or 24 channels; Response time<50 milliseconds; Supports both push and pull airflow directions; Support stopflowperhapsflow-throughTwo gas path switching modes; Equipped with a 2-line LCD display screen; Power supply 12-15VDC, equipped with AC adapter; Working temperature: 5-45 ℃, no condensation; Weight 3.6kg; Size 20.3cm × 30.5cm × 15.2cm;

6.Data collector: 12 signal input channels, of which 8 analog input channels can measure voltage signals from -5.12V to+5.12V, with 16 bits of digital to analog conversion; Four dedicated temperature input channels are specifically connected to temperature sensors, with a temperature measurement range of -5 to 60 ℃; 2 analog signal output channels, 0-5V, 12 bit resolution; 1 16 bit counter; 8 digital outputs for system control, TTL level; Sampling frequency 100Hz; USB data cable; Equipped with a 2-line LCD display screen; Equipped with 0-5V BNC analog signal output; Digital output RS-232; USB direct power supply; Working temperature: 0-50 ℃, no condensation; Weight 0.9kg; Size 17cm × 15cm × 7cm;

7.Implantable body temperature and heart rate recorder, with built-in battery and no need for external electromagnetic field power supply, can be downloaded or telemetry through the communication box. The weight of the mouse recorder is only 1g, and the main technical indicators are shown in the table below. Other telemetry recorders such as E-meter can be optionally equipped

8.Professional technical configuration and training, including training on different assembly and operation techniques such as closed, open, suction, push, and sampling flow injection methods.

Origin: United States

Simultaneous measurements of daily rhythms in oxygen consumption (V__O ), body temperature (T ), gross motor and wheel-running activity of tuco-tucos