NTC temperature sensors Measurement of liquid temperatures between 40 C and +130 C @ For a wide variety of liquid- temperature measurements using temperature-dependent resistors Range NTC temperature sensor . BOSCH Technical data 6} | | Part No. 1.147 212 031 0 280 130 026 : : Characteristic curve 1 2 Roane NTC pellet cast into a waterproof Measuring range C 40... +110 -30 ... +130 aa . op T Application: This sensor is fitted between eran C C _ 12 the evaporator fins on coolers. at 100C C _ 3.4 1147 212 031 Measuring current through sensor, max._ mA - 5 Accessories Resistance at 0 C kQ 942% - : Nominal resistance at 20 C kQ - 2545 % Seeletiowena AVENE EGIL eee ecepiac -10C kQ - 8.26 ... 10.56 + 20C kQ - 2.28 2.72 NTC temperature sensor + 80C __ ko = 0.290 ... 0.364 : : . . Permissible loading, Design: NTC thermistor with plastic sheath max. at 55C W 0.1 _ in brass housing. Power loss max * 0 280 130 026 at AT = 1 K and stationary Accessories water at 23 C mW - 15 ~ Nominal voltage Vv = 5 @ Connector { 237 000 036 Degree of protection - IP 54A Time constant in stationary water s <3 - Permissible vibration acceleration m:s - 600 Corrosion-tested as per = DIN 50 018 Mean temperature coefficient QC - - = between 0... 100 C Diagram | Characteristic curve 1 "| 10 0! 10775 al -40 4 10 Resistance R 0 40 so 61 Temperature 0 Characteristic curve 2 2 1047- % 8 $ 103}- n 3 2 a 402[- 10 ! -20 0 20 40 60 80 100 120C ; Temperature 0 | Dimension drawings 1147 212 031 0 280 130 026 075-03 28 me 50,5 Temperature sensor 1 147 212 031 1 Electrical connection, 2 Housing, 3 Interconnecting wire, 4 NTC resistor. af ee OD ce fe bt inn Temperature sensor (Principle) 1 Electrical connection 2 Housing 3 NTC resistor, PTC resistor Design and function NTC sensor The sensing element of an NTC tempera- ture sensor (NTC: Negative Temperature Coefficient) is a resistor made up of metal oxides and oxidized mixed crystals. This mixture is produced by means of sintering and pressing with the addition of bonding agents. The NTC thermistors are provided with a protective housing for automotive applications. if NTC thermistors are exposed to a source of external heat, their resistance drops drastically, This property can be utilized for temperature measurement. NTC sensors are suitable for a very wide variety of am- bient conditions, and their design is such that they permit the detection of liquid temperatures over a broad spectrum. Explanation of symbols: R Resistance o Temperature