Technology and standards in temperature measurement
Tolerance classes, thermowell forms, explosion protection, materials: the principles by which a temperature sensor is designed — written by a manufacturer that has been producing in Hanau since 1970.
Every page ends where you continue working: at the configurator of the matching series.
Standards and basics
Pt100 and Pt1000: tolerance classes
Class AA, A, B and the divisors 1/3 and 1/10 DIN B — with a full table and the question of when the tighter class pays off.
Thermocouples: types and tolerances
Types K, N, J, T, E, S, R and B with application range, colour coding and reference table in mV.
Thermowell forms from form 2 to form 4F
Which form belongs to which mounting, when a tapered tip pays off and where solid material is required.
Design and selection
Thermowell calculation
Vortex shedding, natural frequency, static and dynamic stress. Send us your process data — we calculate and send you the verification.
Pt100 or thermocouple?
Accuracy, measuring range, response time and cost compared — and the rule of thumb for the +600 °C limit.
Two-, three- or four-wire
What the cable resistance costs, when the three-wire circuit is enough and where four wires are a must.
Explosion protection and materials
Zones, types of protection, marking
What Ex ia, Ex ib and Ex eb mean, which zone requires which category and how to read a type plate.
From 1.4571 to Alloy 625
Maximum temperature, short name and typical use for every material we process — including ceramics C610 and C799.
Converting Schramm types to GHI
The Schramm series we took over and their current equivalents, with identical installation dimensions.
Your measuring point doesn't fit any table?
Send us medium, temperature, pressure and installation — you will receive a proposal with order code within one working day.