Barometer logger sensor NUL-221

This logger sensor measures atmospheric barometric pressure and can display data in four common units.

• kPa – kilopascal
• atm – atmospheres
• in Hg – inches of mercury
• mm Hg – millimeters of mercury The sensor also offers an option to display the measured pressure values in terms of altitude (in meters).

Barometric pressure can be measured at sea level (1 atm) and also on mountains (lower than 1 atm).

CO2 logger sensor NUL-260

This logger sensor is based on an electromechanical reaction between CO₂ gas and the sensor.

The result of the electromechanical reaction is voltage, measured by the logger sensor. The measure units are ppm (parts of CO₂ per million of air).

Note: The sensor must be calibrated before every use according to the following simple procedure: connect the sensor to the PC through a USB module or a battery module. Wait for about 15 minutes to warm the sensor and press the pushbutton switch on the CO₂ logger sensor for 3 seconds. Preferably this calibration should be performed in open space. A bottle adapted to the sensor is supplied.

Colorimeter logger sensor NUL-219

The colorimeter measures transmittance and absorbance of red, orange, green and blue light components projected on a solution.

The colorimeter logger sensor has an opening for a special square solution cuvette. It turns on four different lights in known values and measures the received light that passes through the solution.

This sensor has two modes of operation: Absorbance and Transmitence. Note: The plastic tube (cuvette) must be put in a certain way inside the colorimeter. The cuvette has two rough sides. These sides should not be in the line of the light. Three cuvettes are supplied with the sensor.

Electrocardiogram logger sensor NUL-218

Identical in its use to a regular medical ECG (electrocardiogram), this is a rather simple three lead based logger sensor. It presents a heartbeat graph that allows a thorough examination of the heart’s electrical activity from three different angles. Unlike most ECG devices, this unit operates with non-disposable electrodes.

GSR logger sensor NUL-217

The Galvanic Skin Response (GSR) logger sensor measures the conductivity of our skin, especially of our fingers.

The conductivity of our skin changes according to unconscious emotion effects such as sudden noise, smell, touch, pain or view.

This sensor has two ranges: conductivity in microsiemens and arbitrary numbers.

Spirometer logger sensor NUL-216

The logger sensor enables measuring the volume of our lungs. The sensor includes a tube and it measures the air flow that passes through it. The volume (in liters) is calculated by the software area calculation function.

The tube has a narrow part in its center and it measures the flow rate by measuring the pressure difference between the two ports of the tube

Conductivity logger sensor NUL-215

This logger sensor is based on a probe with two electrodes with known surface area and distance between them. A signal is supplied to the electrodes and by testing the signal behavior, the conductivity of the solution is calculated

The logger sensor has three ranges for displaying the solution conductivity:

• µS/cm – microsiemens per centimeter
• mg/L – milligram per liter
• ppm – parts per million

Magnetic Field logger sensor NUL-214

This is a very sensitive magnetic fields sensor. It can measure a very low level of magnetic fields such as the magnetic field of Earth.

The logger sensor measures the magnetic fields in milli Tesla (mT).

Motion logger sensor NUL-213

This sensor uses an ultrasonic transducer to transmit an ultrasonic wave and measure the time of the echo return. In this way, the sensor measures the distance to an article located against it.

Using the module software, it is able to calculate also the item’s velocity and acceleration. Therefore the sensor has three modes of operations: Distance, Velocity and Acceleration.

Sound logger sensor NUL-212

This sensor has two modes of operation. In slow mode it can be used to measure sound-pressure level in decibels. In fast mode it can display waveforms of different sound sources such as tuning forks and wind-chimes so that period and frequency can be determined. With two sound sensors, the velocity of propagation of sound in various media could be determined by timing a pulse travelling between them. The sound sensor is located in a plastic box accessible to the atmosphere via a hole in its side.