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Common
Sheath resistance thermometers are used for temperature measurement
- in containers, pipes, appliances and machines in laboratories or test facilities
- in gaseous and liquid media such as air, gases, water, oil, etc.
- in low-and high-field flow at low speeds.
This section of the catalog contains ready-to-fit sheath resistance thermometers for different measuring ranges from -200 ° C to +600 ° C.
The specific characteristics of the sheath resistance thermometer of this catalog are:
- Small type
- Fast response
- Flexibility over the length of the jacket pipe, except the probe tip
Structure
In the thin-walled stainless steel tube of the jacket pipe 2, 4 or 6 wires inside line in ceramic powders and isolation. The sensor is equipped with the inner cable wires connected and embedded in ceramic powder.
Election Types
The offered in this catalog are the types most commonly used forms and designs. The selection is based on operating conditions:
- Temperaturmeßbereich
- Accuracy, for instance Pt 100 DIN IEC 751 Class B, and choice of the electrical circuit, at the request Certificates can be created
- Durability of materials
- Installation conditions, mounting and cable connection
Electrical Characteristics
Sheath resistance thermometer
- Have an insulation resistance 1000 mm / Test voltage 250 V at 3.0 and 6.0 mm
50 mm / Test voltage 100 V at 1.6 and 2.0 mm
- thermoplastic stress-free, ie. the thermocouple voltage is 10μV at 200 ° C
- have lengths up to about 1000 mm (6 mm) and 350 mm (3 mm) inside a negligible line resistance. If the interior line resistance> 0.1, he indicated.
Response
Sheath resistance thermometers have a short response time and quick response to temperature changes.
Self-heating
The self-heating resulting from measurement error is generally negligible.
Delivery
The product group sheath resistance thermometer consists of 5 basic types, based on the following survey sheet below.
Standard designs
Standard designs are the most frequently used designs. They are short, often from stock and are also used in small volumes of inexpensive offered.
Variants
Variants broaden the scope of the standard program by combining shapes, materials and dimensions. By using standardized components or parts can be a variety of forms quickly and efficiently produce, with most technical demands can be met.
Special designs
Special designs can be used for special purposes or requirements on request.
Examples of special designs are:
- Different nominal (eg 500 or 1000)
- Different temperature coefficient (eg 0.00391)
- Pt Meßwicklung with restricted or enhanced tolerance to a defined temperature range
- Einschraubzapfen with other threads
- C Sheath resistance thermometers for temperatures above 600 ° C
- Sheath cable with sheath of other materials
To process the request we ask for the following information:
- Description of the measuring and installation conditions, preferably with a sketch.
- Description of the sensor dimensions and materials, if there are ideas on the design.
- Indicating the order number, order number or drawing number, where a similar special design has been previously calculated.
Mounting instructions
The immersion length should be chosen so that the probe tip 5 x OD plus TEL (temperature-sensitive length) for liquids and 20 x outside diameter plus TEL for gases to be measured by the medium is surrounded by the measurement error due to heat dissipation negligible to date. The possible bending radius of the jacket pipe is 1.6 5 mm, 2.0 6 mm, 3.0 9 mm and 6.0 18 mm. The non-flexible length of the probe tip at 1.6 and 2.0 = 40 mm and 6 = 65 mm
For the connection to the meter can only couple to the thermal equilibrium line may be used.
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