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.

Light logger sensor NUL-204

This sensor is very versatile with applications in many areas of the natural sciences. It can be used to study photosynthesis in biology, light-emitting chemical reactions in chemistry, the effect of changing voltage on a light-bulb’s output in physics and more.

This sensor measures illumination with three ranges; it can be used in low light environments such as in a classroom, or high light environments as in daylight outdoors.

With both fast and slow modes, it can be used to measure fast light changes such as those produced by light bulbs connected to an AC supply, as well as the almost steady levels outside on a sunny day.

The light sensor in located in a plastic box just behind an access hole.

Current logger sensor NUL-202

This sensor can be used to measure the current in parallel or series branches of low voltage AC and DC circuits and also to investigate the dependence of the current flow through components on the voltage across them.

With its 4 mm plugs it can easily be connected into electric circuits.

Voltage logger sensor NUL-201

This sensor measures voltages across various resistive, capacitive and inductive components, as well as those of photovoltaic cells, batteries and power supplies. This sensor can also be used to measure electrode potentials and to investigate the charging and discharging of capacitors.

When used in conjunction with the

Current sensor, the dependence of the current flowing on the applied voltage can be studied in various electric circuits.

This sensor can be used to measure low voltage AC and DC circuits. With its 4 mm plugs, it can easily be connected into electric circuits.

It can also measure, using a step-down transformer, the AC voltage of the main supply and check its frequency 50/60 Hz (the input is limited to ±20 V).