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| NTC THERMISTORS: TYPE G GL GLASS ENCAPSULATED BEAD DESCRIPTION: Type G thermistors incorporate a directly heated bead of semiconductor material in a solid glass pellet, connection being by means of two cunife wires. These wires are normally tinned but thermistors G55, G26 and G16 which are intended to operate at temperatures up to 300C have untinned cunife wires suitable for welding or brazing. The type G thermistor is available in three styles of glass pellet, the largest size is referred to as `Standard' (G-C), the smaller size as `Miniature' (G-D) and the Probe as GL - eg a miniature G13 is coded G13D. These thermistors are suitable for general use in the field of temperature measurement, control or compensation, flow measurement and similar applications. DIMENSIONS: DATA: B value tolerance ......................................5% Thermal Time Constant G - C ........................................................21s G - D........................................................19s Dissipation Constant G - C ................................................1.3mW/K G - D................................................1.1mW/K GL -..................................................1.2mW/K LOW RESISTANCE TYPES: TA max .....................................................125C TB max.....................................................125C Pmax at 20C G - C..............................140mW G - C..............................120mW GL..................................130mW Derate linearly to zero at 125C MEDIUM RESISTANCE TYPES: TA max .....................................................155C TB max.....................................................200C Pmax at 20C G - C ...............................230mW G - D...............................200mW GL...................................220mW G - C Derate linearly to 55mW at 155C G - D Derate linearly to 50mW at 155C GL - Derate linearly to 53mW at 155C HIGH RESISTANCE TYPES: T A max....................................................300C T B max ...................................................300C P max at 20C G - C..............................360mW G - D ...............................310mW GL - .................................340mW Derate linearly to zero at 300C. Code G-C G-D GLLead Dia. mm 0.40 0.35 0.35 Body Dia. (max) 3.2 2.5 2.5 Average Weight 0.15 0.11 BOWTHORPE THERMOMETRICS Crown Industrial Estate, Priorswood Road Taunton, Somerset TA2 8QY UK Tel +44 (0) 1823 335200 Fax +44 (0) 1823 332637 THERMOMETRICS, INC. 808 US Highway 1 Edison, New Jersey 08817-4695 USA Tel +1 (732) 287 2870 Fax +1 (732) 287 8847 KEYSTONE THERMOMETRICS CORPORATION 967 Windfall Road St Marys, Pennsylvania 15857-3397 USA Tel +1 (814) 834 9140 Fax +1 (814) 781 7969 NTC THERMISTORS: TYPE G GL GLASS ENCAPSULATED BEAD R20 R25 Emax in free air at 20C GC only (V) Rmin B25-85 K Code Low resistance types G22 C, D and L G52 G13 G23 G53 Medium resistance types G14 G24 G54 G15 G25 High resistance types G55 G16 G26 200 500 1k 2k 5k 10k 20k 50k 100k 200k 172 425 840 1.65k 4.15k 8.2k 16.2k 40k 79k 156k R100 15k 30k 60k 1.9 2.9 3.9 5.3 8.2 11 16 24 34 46 19 40 70 113 250 110 160 320 520 810 2750 2900 3000 3125 3400 3600 3800 4075 4275 4400 B100-200 4700 4850 5000 500k 1M 2M 62 87 120 180 330 560 Example Description Standard Values G = pellet GL = probe see above table C = standard D = miniature (not applicable to GL) W = 20% Y = 10% Z = 5% G sensor style 54 resistance code C body size CODING: Resistance/tolerance and physical style are specified by the product code. e.g. G54CY Y resistance or response temperature BOWTHORPE THERMOMETRICS Crown Industrial Estate, Priorswood Road Taunton, Somerset TA2 8QY UK Tel +44 (0) 1823 335200 Fax +44 (0) 1823 332637 THERMOMETRICS, INC. 808 US Highway 1 Edison, New Jersey 08817-4695 USA Tel +1 (732) 287 2870 Fax +1 (732) 287 8847 KEYSTONE THERMOMETRICS CORPORATION 967 Windfall Road St Marys, Pennsylvania 15857-3397 USA Tel +1 (814) 834 9140 Fax +1 (814) 781 7969 |
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