This series of thermometers is designed for installation in pipes and tanks. Versions with and without thermowell offer many possibilities for temperature measurement in liquid and gaseous media. Use of the thermometers in potentially explosive atmospheres is possible without any Ex-specific marking in zones 1 and 2. (gases, ignition groups IIA, IIB, IIC) Standard version
Measuring element
Bimetal coil
Nominal size in mm
25, 33, 40, 50, 63, 80, 100, 160
Connection design
S Standard (male thread connection)
1 Plain stem (without thread)
2 Male nut 1)
3 Union nut 1)
4 Compression fitting (sliding on stem) 1)
1) Not for NS 25, 33, 40, 50
Models
Accuracy class
NS 25, 33: ±5 % of scale range
NS 40, 50: 2 per EN 13190
NS 63, 80, 100, 160: 1 per EN 13190
Working range
Continuous loading: Measuring range per EN 13190
Short time (24 h max.): Scale range per EN 13190
Case, bezel ring, stem, process connection and spacer
Stainless steel
Elbow behind the case
Aluminium, only with lower mount version
Dial
Aluminium, matt, black lettering
Window
Instrument glass
NS 33: polycarbonate
Pointer
NS 25, 33, 40: Aluminium, black
NS 50, 63, 80, 100, 160: Aluminium, black, adjustable pointer
Permissible pressure rating at the stem
NS 25, 33, 40, 50: max. 6 bar, static
NS 63, 80, 100, 160: max. 25 bar, static
Ingress protection
NS 25, 33, 40: IP 54 per EN 60529 / IEC 529
NS 50, 63, 80, 100, 160: IP 43 per EN 60529 / IEC 529
Options
■ Scale range °F, °C/°F (dual scale)
■ Other scale ranges
■ Other connection types Scale range, measuring range 2), error limit (EN 13190)
Scale graduation per WIKA standard 
Connection design
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