Used to detect thermal radiation, visible light and ultraviolet light. The sensitivity is wavelength dependent in the range 150 nm-15 µm. The output voltage is closely proportional to the incident radiant energy. Suitable for measuring small temperature differences. Quick stabilization, 2-3 p. Consists of 16 series-connected thermocouples placed in a conical reflector. The elements are protected by a high-gloss metal cylinder, which is fitted with a removable protective glass at the front. Suitable for use with, for example, microvolt amplifiers 765-1293 in conjunction with demonstration instruments 765-1247 or for connection to Phywe's large analog or digital demonstration multimeters. Comes with protective tube and gap.

• Thermos stack according to Moll

Protective tube for thermos stack

Reduces the measuring angle of the thermopile. This prevents unwanted lateral radiation from affecting the measurement results. Black lacquered brass tube. Plug-in socket suitable for the thermal cylinder's protective cylinder.

Length: 150 mm

Diameter, inner: 35 mm

Column for thermos stack. Used when measuring emission spectra. White metal screen with slit. Plug-in socket suitable for the thermal cylinder's protective cylinder. Slot width: 2 mm; Screen: 150 × 50 mm