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DrDAQ data logger
sensors and accessories
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US
Prices
CDN Prices
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As well as the built in sensors, DrDAQ has sockets for optional external
sensors. When a sensor is plugged in to the external sensor sockets, the
software detects it and automatically scales readings. For example if a
temperature sensor is plugged in readings are displayed in °C or if a
humidity sensor is plugged in, readings are displayed in % RH.
External sensors are optional extras so can be purchased at any time.
It is however cheaper to purchase sensors at the same time as a DrDAQ.
See the pricing link listed above for more information.
Details of the external sensor sockets are provided with DrDAQ. This
allows users (and third party manufacturers) to develop their own
sensors.
DrDAQ Temperature Sensors
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A high accuracy general purpose temperature sensor with a 2
metre lead. Suitable for air, surface or liquid measurements.
Our science experiment on the freezing
of pure and salt water shows the temperature sensors in use. |
| Range |
-10 to 105°C |
| Resolution(at 25°C) |
0.1°C |
| Accuracy(at 25°C) |
0.3°C |
DrDAQ pH electrode
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pH is measured using a standard electrode with a BNC
connector. Pico supplies a robust epoxy bodied pH electrode
ideal for educational use. It covers the full 0 to 14pH range.
The electrode comes complete with a small bottle of storage
solution to help prevent it drying out.
Our science experiment measuring
the pH of drinks shows the electrode in use. |
| Size |
12 x 120mm |
| Operating temperature |
0 to 60°C |
| Resolution |
0.02pH |
DrDAQ Oxygen Sensor
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Oxygen in air is measured using a galvanic cell sensor which
connects to the external sensor sockets using the supplied three
metre lead. Simply plug in the sensor and you are ready to
measure.
Unlike previously available oxygen sensors, the DD103 Oxygen
sensor can measure the full 0 to 100% range. This makes it ideal
for many chemistry, biology and physics experiments.
Our science experiment "burning
oxygen" shows the electrode in use. |
| Sensor type |
Galvanic Cell (lead-oxygen with weak acid electrolyte) |
| Input range |
0 to 100% oxygen |
| Accuracy |
±3% (Uncalibrated)
±1% (Calibrated at constant temperature / pressure) |
DrDAQ Humidity sensor
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This sensor is designed for the cost effective measurement of
relative humidity. When plugged into one of the external sensor
sockets on DrDAQ (using the supplied 3m cable) readings can be
displayed in %RH. The sensor has a response time of 60 seconds
and can operate over a 0 to 60 °C temperature range.
Our science experiment on transpiration
shows the sensor being used to measure the humidity change
caused by a plant.
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| Range |
20% to 90% RH (Non condensing) |
| Accuracy |
±10% |
| Resolution |
0.2% RH |
| Size |
72 x 45 x 28mm |
DrDAQ Reed Switch
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The reed switch sensor can be used to detect the presence of
a magnetic field such as from a bar magnet or an electromagnet.
Alternatively, a simple external switch can be wired to the
internal screw terminals. It has a fast response time of 2ms so
can be used as an alternative to a light gate for timing
applications. Other used include monitoring the amount of time a
door is left open or a machine running.
Our science experiment scalextric
subaru challenge shows how the sensor can be used to measure
the speed of a model car.
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Griffin Rate Meter
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The Griffin rate meter provides an indication of the level of
radioactivity given off from a source. Our Application
note explains how to configure the pH input of DrDAQ for use
with the Griffin rate meter.
The rate meter can be obtained direct from Griffin and
George, details on their Web
site.
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DrDAQ Sensor Adaptor
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This compact unit will prove
invaluable to anyone developing their own sensors for the DrDAQ.
A short length of cable is terminated with an FCC 68 4/4 data
plug, which is compatible with the external sensor sockets on
the DrDAQ. The four lines
are clearly labelled and brought out to four 4mm sockets on the
adaptor unit so that external circuitry can be easily connected
and developed.
Part Number is DD013 |
Sensor cable extension
3 metre sensor extension cables are available to enable sensors to be
used further from the DrDAQ data logger.
Accessories
Data logging book
Data Logging in Practice by Roger Frost
This 142 page book contains a huge number of experiment ideas for
teachers. It was recently reviewed in the Association for Science
Education (ASE) journal:
"Teachers cannot always define professional work, but they can
always recognise it and this is a prime example. For a start, this book
deals with the real world of schools, and invites the teacher, as a
fellow professional, to analyse what is available, and to bounce ideas
about. The greatest value of this book is in its first 30 odd pages.
There are indexes and tables to relate the contents to the context of
teachers. There are clever and helpful organisational suggestions. There
is advice on types of sensors and choosing them for experiments. The
experimental details are not concerned with what kind of hardware is
used, but much more with the treatment of results. Relevant web sites
are noted. Strongly recommended for all schools who intend to use
this technique."
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