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.

Force logger sensor NUL-211

This sensor can measure the mass to weight relationship and study how different pulley systems affect the effort needed to lift weights. It can also be used to measure push/pull forces and impacts. There is a hook at the bottom of the force sensor that can be connected to various pulling loads.

The sensor can be hung from a universal laboratory stand via a rod through the hole in it.

This sensor can be operated facing upwards, downwards or at any intermediate (including horizontal) position.

Pressure logger sensor NUL-210

This sensor can be used to monitor chemical reactions that involve gases and to investigate both Boyle’s Law and the Gay-Lussac’s Law for ideal gases. It can also prove useful in studies of weather phenomena and yeast fermentation.

The pressure sensor is located in a plastic box. The sensing part is connected to a plastic tube for connection to pressure sources such as a syringe via an adapter.

Photo Gate logger sensor NUL-209

This sensor can be used to study various kinds of motion. With six modes of operation, time, velocity or acceleration can be measured with one or two photo gates and associated timing cards, as well as showing pictorially the status (digital 1 or 0) of the voltage output of the photo gate as timing cards pass through it.

The modes of operation are selected by clicking a button on the software screen.

The measured values can be displayed in large numbers or in a table.

The sensor’s six modes of operation are described below:

• Velocity with a single gate
• Acceleration with a single gate
• Acceleration with two gates
• Velocity and Momentum with two gates
• Delta between two gates
• Velocities with a timing card

Heart Rate & Pulse logger sensor NUL-208

This sensor can be used to monitor and compare pulse rates under various exercise and rest conditions. Additionally, it can show changes of blood volume/flow in the finger or ear lobe with time.

The sensor has two modes of operation: measuring the BPM (Beats per Minute) of the heart rate or displaying the analog arbitrary value of the measured signal.

The electrodes are both plethysmograph-based. The sensors consist of an infrared LED transmitter and a matched infrared phototransistor receiver.

For best results, the sensor should be kept away from direct sunlight and high intensity lights. The student whose pulse is being measured should be still without moving as much as possible.

Relative Humidity logger sensor NUL-207

This sensor measures relative humidity. It can find use in recording variations with weather conditions and the relative humidity effect on organisms such as seedlings and insects.

It is located in a plastic box with exposure of the sensor being through a hole in the side.

pH logger sensor NUL-206

This sensor can be used to measure the static pH values of common liquids (water, milk, soft drinks, vinegar, etc.) as well as the changing values in titrations or experiments such as those looking at the effect of antacids.

The pH sensor is designed for long life in a variety of general purpose situations. Its sealed reference system and gel fill make it easy to use and maintain. With an epoxy body it is a durable electrode for use both in the laboratory and in the field.

Oxygen logger sensor NUL-205

This sensor can be used to make measurements of the level of free oxygen in air or dissolved oxygen in water.

The free oxygen in air mode is used to measure changes in oxygen levels during combustion or in reactions that produce oxygen (hydrogen peroxide decomposition). The dissolved and free oxygen modes are very useful in the study of photosynthesis.

The oxygen sensor is designed for use both in the school laboratory and in the field. It employs easy-to-use polarographic (Clark) technology and replaceable membranes are available for it. The electrode itself is constructed of Delrin® for durability.

With its integral thermistor, it provides dependable temperature-compensated measurements. The thermistor is housed in stainless steel and sealed on the electrode’s outer wall providing fast, accurate readings.

This sensor can be used for temperature measurements in solids, liquids or gases.