Wireless Pressure Sensor Redy

Quick Answer: The Redy wireless pressure sensor measures the pressure of a gas connected to its port and transmits readings wirelessly, so pressure can be logged against time, volume or temperature. Used as a wireless gas pressure sensor, it serves gas-law and reaction-rate experiments.

Gas Laws and Reactions Through One Port

Connect a syringe to the sensor port and push the plunger in steps: pressure rises as volume falls, and their product stays close to constant, which is Boyle’s law. Put a sealed flask of air into a water bath and log pressure as the water heats, and a straight-line link with absolute temperature appears. These two experiments are the core of school gas-law work, and logging makes them quick enough to repeat.

Chemistry makes just as much use of it. A reaction that gives off gas in a sealed flask, such as magnesium with hydrochloric acid or hydrogen peroxide breaking down over a catalyst, raises the pressure at a rate that tracks the reaction rate, so changing concentration, temperature or catalyst gives clearly different slopes.

This is a single-port sensor measuring pressure in one system; for the difference between two points, as in a Venturi tube, the wireless differential pressure sensor is the right choice. The title does not say whether the reading is absolute or gauge, nor give the range or fittings.

Specifications

Applications

• Boyle’s law with a syringe connected to the sensor
• Pressure and temperature of a fixed volume of air in a heated water bath
• Rates of gas-producing reactions such as magnesium with acid
• The effect of catalase or yeast on hydrogen peroxide breakdown
• Vapour pressure build-up as a volatile liquid evaporates in a sealed flask

Care & Handling

• Never let liquid be drawn back into the port; keep the sensor above the reaction mixture.
• Stay within the rated range, since vigorous reactions in small sealed vessels build pressure quickly.
• Use short, stiff-walled tubing so the connection itself does not change volume.
• Release pressure before disconnecting the tubing.

Why Choose LabEquip

Physics departments teaching the gas laws and chemistry teachers covering reaction rates often share a pressure sensor between them. It is available from LabEquip under chemistry lab equipment; let us know which experiments you plan through the contact page.

Frequently Asked Questions

How do I do Boyle’s law with the pressure sensor?

Attach a syringe holding a known volume of air to the port, then push or pull the plunger in steps and record pressure at each volume. Plot pressure against one over volume; a straight line through the origin supports the law.

Why are my Boyle’s law results slightly off?

The air in the tubing and sensor adds a small extra volume that the syringe scale does not show. Keep tubing short, move the plunger slowly so the temperature stays steady, and check the syringe does not leak.

Is the reading absolute or relative to the atmosphere?

Sensors for gas-law work usually read absolute pressure, so an open port shows atmospheric pressure. Find out which applies to this model before comparing readings with a gauge.

Can it measure liquid pressure?

Gas pressure sensors are not designed to have liquid in the port. Pressure in a liquid can be measured indirectly through an air-filled tube, but liquid must never reach the sensor.

How does pressure show the rate of a reaction?

When a reaction produces gas in a sealed flask, pressure rises as the gas builds up. The slope of the pressure against time graph is proportional to the rate at which gas forms.

What is the safe way to seal a reaction flask?

Use a bung with a single outlet to the sensor and small amounts of reagent, and stop the run well before the top of the range. Never seal a vigorous reaction in a vessel with no way to release pressure.

Last Updated: September 2026