The measuring principle
The temperature measuring is made through a bimetal spring built-in the temperature feeler. The coiled spring consists of two firmly fixed metals with different coefficient of expansion.
A change in temperature leads to a torsion of the bimetal coiled spring, the pointer axis, and pointer.
See ill.1 and ill.2 The bimetal measuring system is artificially aged in a special process to ensure a proper measuring reaction for a long time.
Measuring point should be free of any vibration or shocks.
Otherwise we could supply instruments with oil-filling. In that case the range should not exceed 200°C. The measuring range are 100% limit load. One exception is in the range 0+500°C.
The max. continuous temperature allowed is 450°C.
Each Thermometer is provided with mounting- and operating instruction. In addition Thermometer with switch will be supplied with working instruction according to EN 61010 part 1.
Fitting the feeler into a pipe, a suitable position with respect to the medium flow should be selected for the feeler, see ill. 3-5.
Pointer adjustment: Display adjustment at instrument pointer is standard, except by limit value switch.
Bayonet-ring case: Nominal size 100 or 160
Grade stainless steel, protection type IP 65
Other case diameter available upon request.
NG 100, general polycarbonat, special execution float glass or security glass.
NG 160, general float glass, special execution security glass or polycarbonat.
Dial: white varnished aluminium, black printed, declination angle 270°, inscription acc. to DIN EN 13190.
Pointer: black anodised aluminium.
Axis bearing: multiple, for perfectly smooth running. below dial, in connection parts and stem, each with additional
Teflon bearing (if temperature range permits).
Joint WN 1001: stainless steel 1.4301, swivel mounted 90° from the horizontal position.
Feeler: stainless steel 1.4571
∅ 6-0,1 mm maximum length up to 400 mm.
∅ 8-0,1 mm maximum length up to 800 mm.
∅ 10 mm maximum length up to 1200 mm.
Protective sleeve: execution acc. to 16179 / DIN 43763 or acc. to draft DIN 43772 1)
Special grades available e.g. Hastelloy, Inconel, Titanium, special brass.
Surface coating possible.
The thermometers have a examination certificate of TÜV Nord ( TÜV 04 ATEX 2685 X ).
II 2 G D without fixtures or
II 2 G IIC TX and / or II 2 D TX°C
Subject to alteration, even of technical kind. 03/06
Certified to DIN EN ISO 9001
- nominal size 100 and 160 mm
- protection type IP65
- for the chemical industry and general engineering
- and construction available
- in adjustable angle-, horizontal-, vertical execution
- measuring range -200 up to +600 °C
- with value switch
- multifunctinal relay
- ATEX admission (on request)
- protective sleeves as structure group 40