3B Scientific Radiation of Heat Thermopile User Manual

3B SCIENTIFIC

Instruction sheet

07/06 SP

®

PHYSICS

Thermopile 8441301

1 Inlet (funnel)
2 Shaft
3 Metal housing
4 Measurement output (4-mm safety connec-

tors)

1. Description

The thermopile is a highly sensitive apparatus used
for measuring radiation (e.g. heat radiation from
black bodies, reflection of long-wave heat radiation).

Integrated in a metal housing with a polished funnel,
the thermopile consists of a black surface of 15 mm
diameter to which 17 thermocouples are connected.
The thermocouples generate a thermoelectric poten­tial U which is proportional to the intensity of the
incident heat radiation.

2. Technical data

Sensitivity: 0.14 μV/μW approx.

Setting time: 40 s for 95% of the meas-

ured value

Black surface: 15 mm ∅

Internal resistance: 1 Ω

Connections: Two 4-mm safety connec-

tors

Dimensions: 94 mm x 40 mm ∅

Shaft: 10 mm ∅

Weight: 200 g approx.

1

3. Operation

To conduct the experiment, the following apparatus is
additionally recommended:

1 Instrumentation amplifier for students’ experiments
8532161

1 x 4-mm high-frequency BNC cable U11257

1 Multimeter ESCOLA 10 8531160

1 Stand base 8611210

In order to prevent any drifting of the output voltage,
the metal housing of the thermopile should be at
room temperature.

• After setting up the experiment, wait for a few

Readings may be made incorrect due to the influence
of body heat or other external influences.

• Do not touch the apparatus while taking read-

ings.

• Avoid direct sunlight and do not set up the appa-

ratus in the vicinity of a heater/radiator.

• Set up the thermopile approx. 3 cm away from

the object of the experiment (e.g. Leslie’s cube

8442830).

• Connect up the instrumentation amplifier and

the multimeter.

minutes before taking readings.

T

V

Fig. 1 Experimental set-up Leslie’s cube

U

I

12 V AC

Elwe Didactic GmbH • Steinfelsstr. 6 • 08248 Klingenthal • Germany • www.elwedidactic.com

3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com

Technical amendments are possible.