MEASURING EQUIPMENT

Equipment for measuring the age of the air by tracer gases

equipomedicion
GAS DOSER AND SAMPLER, MODEL 1303 FROM BRÜEL & KJæR:
dosificadorThis equipment is able to dose controlled amounts of tracing gas into the test chamber and at the same time to trace and collect samples from different locations and deliver them to the gas analyzer. The doser is able to release the gas on six different locations, automatically calculating the released gas quantity. The tracer hoovers air samples from six different locations, separated up to 50 meters, and delivers them to the 1302 gas analyzer. It is also possible to connect six temperature transductors to capture this data.
The system is composed of six output ducts, each one of them equipped with a solenoid valve. These ducts are also equipped with a nozzle that ensures that the flow released in every point is only dependent the air supply pressure and temperature.
The sampling system has six input ducts, each one of them equipped with a solenoid valve and a connection to the front panel of the Gas Dosifier and Tracer 1303. The six sampling ducts converge in a single duct which can be directed to the Gas Analyzer 1302 for its analysis or back to the gas entrance at the back panel of the Gas Dosifier 1302, with the aid of a pump and a three-way valve. 1302 and 1303 equipments are connected with ducts of the same characteristics as the ones used for the sampling process.

GAS ANALYZER 1302
analizadorThis equipment is able of measuring any gas concentration in air samples collected by the infrared detection photoacoustic method, which is able to measurement any gas which absorbs infrared light. Its optical filters enable it to measurement the concentration of five different gas components and water vapour in any sample. It is possible to remotely control the Gas Analyser 1302 with the aid of a computer and Brüel & Kjaer Application Program 7620 individually or the Gas Analyzer 1302 connected to one or two Tracer and Dosifier Units 1303.
The method consists on the following steps:
• The pump introduces a new air sample from the sampling point and filters it. The old sample is expelled from the chamber at the same time. Air pressure is monitored along the process.
• The chamber is hermetically sealed by closing the input and output valves.
• Infrared light coming from an external source is reflected on a mirror and it goes through a propeller which changes its pattern to intermittent. It goes then through an optical filter placed on the filter carousel.
• Emitted light is absorbed by the gas causing an increase on its temperature. Due to the intermittence pattern of the infrared light, gas temperature increases and decreases and so does the gas pressure on the test chamber causing an acoustic signal.
• Two microphones located on the test chamber walls are able to measurement this acoustic signal, which is directly proportional to the gas concentration in the chamber.
• If it is necessary to measurement more than one gas concentration, the filter carousel would rotate so that another optic filter is selected and the process is repeated. The number of times that this process is repeated depends on the number of gases to be measured.

Equipment for measuring environmental conditions

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DIFFERENTIAL PRESSURE PROBE 0638 1347
sonda1Pressure probes follow the piezoresistive principle and the inductive pressure. The probes can compensate within a temperature range to accommodate possible changes during the course of the experiments. Each probe accepts an overpressure, given in absolute value.
Measurement range = 0 to 100 hPa | Accuracy = ±0,1 hPa (0-20 hPa)± 0,5% measurements (20-100 hPa)
Resolution = 0,01 hPa | Overload limit = 300 hPa | Static pressure = 1000 hPa

DIFFERENTIAL PRESSURE PROBE 0638 1547
sonda2Pressure probes follow the piezoresistive principle and the inductive pressure. The probes can compensate within a temperature range to accommodate possible changes during the course of the experiments. Each probe accepts an overpressure, given in absolute value.
Measurement range = 0 to 100 Pa | Accuracy = ± 0,3 Pa, ± 0,5% del v.m. (0-100 Pa)
Resolution = 0,1 Pa | Overload limit = 50 hPa | Presión estática = 100 hPa

ABSOLUT PRESSURE PROBE 0638 1847
sonda3Pressure probes follow the piezoresistive principle and the inductive pressure. The probes can compensate within a temperature range to accommodate possible changes during the course of the experiments. Each probe accepts an overpressure, given in absolute value.
Measurement range = 0 to 2000 hPa | Accuracy = ± 5 hPa
Resolution = 0,01 hPa | Overload limit = 4000 hPa

MEASURING INSTRUMENT TESTO 400
medicion This portable measuring instrument is used to read, store and analyse singles values and measuring strings. It is used to perform single tests and measurements on site. It is equipped with two connections which allow measuring a range of functions depending on the connected probes:
Temperature, Moisture content, Pressure, Speed, Flow, Gas CO, Gas CO2, Voltage, Current



FEEDER TESTO 0554 1045
alimentadorIt is used to supply energy to the loggers, therefore increasing the measuring time. One feeder can provide energy for up to four loggers with four probes connected ensuring a stable electrical supply.




DATA LOGGER TESTO 0577 4540
dataloggerThe data logger measurements and stores the readings collected by the probes connected to it. The logger has four probes inputs for the different types of probes: temperature, flow speed, pressure, moisture content, CO and CO2, electrical current and rpm probes. The logger is equipped with an internal storage which can register up to 250.000 measurements, with their date and time of collection.
Monitoring capacities can be enhanced by connecting several loggers, which enlarge the number of possible probes connected.

HOT WIRE ANEMOMETER TESTO 0635.1041
Quick-reaction hot wire probe, Ø 10 mm, with telescope, for low speed range measurements, including direction identification.
Measurement range = -20 ... +70 °C | Measurement range = 0 ... +20 m/s | Accuracy (ref. temp. 22ºC) = ±0, 03 m/s

COMFORT ANEMOMETER TESTO 0635.1041
“Comfort” probe works according to the hot wire principle and is prepared to take measurements without the interference of flow direction.
Measurement range = -10 ... +60 °C | Measurement range = 0 ... +5 (10) m/s | Measurement range = 0 ... +100 %HR Accuracy = ±0, 03 m/s ±5% v.m. (0 a 10,00 m/s) | Reference temperature = 22ºC | Reference pressure = 1013 hPa Temperature compensation = ±0,2% v.m./ºC (-10 a 60ºC)

TEMPERATURE THERMOCOUPLE CLASS 1 TESTO 0644.1607 AND ADAPTER TESTO 0600.1693
It is composed of adhesive thermocouples whose conducting material is an aluminium layer. They measure temperature on contact and are the most suitable to measure superficial wall temperature.
Measurement range = -200 ... +200ºC Class 1 | Accuracy = ± 0,5ºC, ±0,001 |T|

CO2 PROBE TESTO 0632.1240
It measures the internal air quality and controls the workbench by the “carbon-dioxide” registry into the air.
Measurement range = 0 to 1 Vol % CO2 | Measurement range = 0 a 10000 ppm CO2 | Accuracy = ± 50 ppm CO2 ±2% v.m. (0 a 5000 ppm CO2) | Accuracy = ± 100ppm CO2 ±3% v.m. (5001 a 10000 ppm CO2)

CO PROBE TESTO 0632.3331
It measures CO gas concentration in the air.
Measurement range = 0 a 500 ppm CO | Accuracy = ± 5 ppm CO ±5% v.m. (100 a 500 ppm CO)