Breckland Scientific 2021 Catalogue

Gas

Properties of Gas

a

1

1 BOYLE’S LAW INDICATOR This simple low-cost apparatus provides a means of demonstrating Boyle’s law. It is not 100% accurate but it is adequate for demonstrations giving students literally a ‘feel’ for increase in pressure against volume. Cat No. Description Price Per HPG-150-100 Boyle’s Law Indicator 14.70 ea. 2 BOYLE’S LAW APPARATUS Apparatus for the recording of pressure versus volumes and for investigating Boyle’s Law. The vertical tube is part- filled with coloured liquid and sealed. The trapped air is then compressed progressively, with pressure (p) and volume (v) readings taken at each stage. Before each pair of readings is taken, the liquid should be allowed to settle so that the heat caused by the compression is dissipated. Please note: oil is no longer included as coloured water can be used instead. Bicycle pump not included. Cat No. Description Price Per HPG-100-100 Boyle’s Law Apparatus 148.16 ea. HPG-100-150 Spare Oil, Red 12.50 250ml 3 JOLLY’S BULB & GAUGE - STANDARD Consists of a glass bulb 60mm dia. fitted with a bourdon gauge to investigate the relationship between temperature and pressure at a constant volume. Pressure readings are shown on the gauge on immersing the bulb in hot or cold water. Cat No. Description Price Per HPG-500-100 Jolly’s Bulb & Gauge Standard 57.68 ea. 4 LASCELLS BOYLES LAW DIGITAL APPARATUS The Digital Boyle’s Law Apparatus provides a self contained, reliable and simple way of demonstrating Boyle’s Law. The volume may be reduced or increased by means of a 2.5ml syringe connected to a digital pressure sensor. The sensor output is calibrated to display the pressure in kPa on the easy to read LCD display. There is a measurable change in pressure for every 0.1ml change in volume, allowing many data points to be taken and a graph plotted to confirm Boyle’s Law. For demonstration purposes two 4mm sockets are provided to allow the pressure reading to be displayed on a large demonstration voltmeter meter (not supplied) and a length of tubing is provided to allow a larger syringe to be used if necessary. Supplied with full instructions and one 9V PP3 battery. Cat No. Description Price Per HPG-245-110 Boyles Law Digital Apparatus 123.20 ea. 5 LASCELLS DIGITAL JOLY BULB Visually and effectively demonstrate the relationship between temperature and pressure. The Digital Joly Bulb is the perfect alternative to the traditional bulb and analogue gauge; pressures can be read directly from the built in digital display and the apparatus is sensitive enough to register an increase in pressure when the bulb is held gently in the hand. By submerging the bulb in water at different temperatures the relationship between temperature and pressure may be demonstrated and the calibrated digital readout allows a quantitative investigation to be carried out if required. For demonstration purposes’ two 4mm sockets are provided to allow the pressure reading to be displayed on a large demonstration voltmeter (not supplied). Supplied with 9V PP3 Battery and full instructions. Cat No. Description Price Per HPG-255-100 Digital Joly Bulb 119.95 ea.

b

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Boyle’s Law Indicator

d

3

2

e

f

g

h

i

j

Boyle’s Law Apparatus

Jolly’s Bulb & Gauge

4

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l

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n

o

Digital Boyles Law Apparatus

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5

q

r

s

t

v

Digital Jolly’s Bulb

w

240

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