Description
Bimetal thermometer WIKA model 55
The model 55 bimetal thermometer has been developed and is manufactured in accordance with the EN 13190 standard.
The high-quality thermometer has been designed especially for the requirements of the process industry.
Especially in the chemical and petrochemical, oil and gas, and power engineering industries, the temperature measuring instrument completely manufactured from stainless steel is used successfully.
The model 55 satisfies the high requirements for resistance against aggressive media. As an option, the case, the stem and the process connection can be made from 316Ti (1.4571) to fulfil the highest requirements.
To allow optimum fitting to the process, individual insertion lengths and different process connections can be selected.
When it comes to harsh climatic conditions at the place of use, the model 55 is the right choice, as it can be used at temperatures ranging from -40 °C to +70 °C (optional also up to -50 °C or -70 °C).
Measuring element
Bimetal coil
Nominal size in mm
63, 100, 160
Connection designs
- S Standard (male threaded connection)
- 1 Plain stem (without thread)
- 2 Male nut
- 3 Union nut
- 4 Compression fitting (sliding on stem)
- 5 Union nut and loose threaded connection
Model overview
Model NS Version
- A5525 63 Back mount (axial)
- A5500 100
- A5501 160
- R5526 63 Lower mount (radial)
- R5502 100
- R5503 160
- S5550 100 Back mount, adjustable stem and dial
- S5551 160
Accuracy class
- Class 1 per EN 13190
Working range
- Normal (1 year): Measuring range (EN 13190)
- Short time (24 h max.): Scale range (EN 13190)
Case, bayonet ring
- Stainless steel 1.4301 (304)
Stem, process connection
- Stainless steel 1.4571 (316Ti)
Dial
- Aluminium white, black lettering
Window
- Instrument glass
- NS 63: window from polycarbonate
Pointer
- Aluminium, black, micro adjustable pointer
Zero adjustment
- on case back side, external only for adjustable stem and dial (option)
Insertion length L
63 … 1,000 mm
minimum/maximum length is dependent on the measuring range and diameter
Temperature limits for storage and transport
- -50 … +70 °C
Permissible ambient temperature
- -40 … +70 °C (with/without filling liquid)
Permissible operating pressure at the stem
- max. 25 bar, static
Ingress protection
- IP65 per IEC/EN 60529
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