RTDelements Intro

QUANTEM^® thin film resistance elements are designed to be the core of every precise temperature measurement system. The resistance of the element varies with temperature in a very precise and repeatable manner, thus allowing its resistance value to be an accurate indication of temperature. The temperature sensitive part of the element is a film of platinum embedded on a ceramic body and covered with glass.

QUANTEM^® elements have a very small thermal mass in relation to surface area, offering exceptional response times, which are recorded as 50% and 90% attainment of source temperature in water flowing at 0.4m/sec and in air at 1m/sec. Elements are available as standard in 1000, 100 and 500 ohm values.

SPECIFICATIONS	RTD ELEMENTS
Size:	2.0 x 10.0 x 1.4 mm (width x length x thickness)
Resistance:	100, 500 or 1000 ohm at 0°C (R₀)
Temperature range:	-50°C to +600°C (Class B), -50°C to +400°C (Class A),
Temperature coefficient (TCR alpha)	3850 ppm/°C ±13ppm/°C (Class B) and ±5ppm/°C (Class A)
Tolerance :	Class A (±0.06%), Class B (±0.12%)
Lead wire :	Platinum coated wire, 0.25mm diameter, 10mm length
Self heating :	170°C/W in air at 1 m/sec
Response time :	50% in water at 0.4m/sec, 0.1 sec : 90% in water at 0.4 m/sec, 0.3 sec : 50% in air at 1 m/sec, 5 sec : 90% in air at 1 m/sec, 12 sec
Repeatability :	0.1 °C
Stability :	less than 0.1°C drift
Vibration :	withstands 10 to 2000Hz at 10Gs
Shock :	withstands 100Gs sine wave shock of 8 millisec
Packaging unit :	5

Temperature measurement with Pt sensors is based on the measurement of electrical resistance. The resistance R_tof Pt sensors varies with temperature in a precisely pre-determined manner. The relationship between resistance and temperature can be expressed exactly by a mathematical function by which the principal values of the Pt 100 resistor can be calculated.

Temperature Coefficient of resistance TCR indicates the average resistance change per one degree at temperatures between 0°C and 100°C

TCR 0.100 = (R₁₀₀ - R₀) / (R₀)/100
Where: R₀= Electrical resistance at 0°C and R₁₀₀ = Electrical resistance at 100°C
The nominal TCR value for Pt resistor according to DIN IEC 751 is: TCR 0.100 = 3850 ppm/0°C

Calculated principal values for Pt 100 are

Temperature	Resistance	Tolerance Class B	Tolerance Class B
deg C	ohm	Ohm	deg C
-50	80.31	±0.22	±0.6
0	100.00	±0.12	±0.3
100	138.50	±0.30	±0.8
200	175.84	±0.48	±1.3
300	212.02	±0.64	±1.8
400	247.04	±0.79	±2.3
500	280.90	±0.93	±2.8
600	313.59	±1.06	±3.3

Part number	Description	Resistance	Tolerance
223-11171-01	EPS100-A20-P06	100 ohm	0.06%
223-11171-02	EPS500-A20-P06	500 ohm	0.06%
223-11171-03	EPS1000-A20-P06	1000 ohm	0.06%
223-11171-04	EPS100-A20-P12	100 ohm	0.12%
223-11171-05	EPS500-A20-P12	500 ohm	0.12%
223-11171-06	EPS1000-A20-P12	1000 ohm	0.12%