E-I Matched Bead Thermistor 009096 115 Series Issue 1 Datasheet FEATURES E-I matched in air or helium Resistance matched at 25 C 77 F Interchangeable parts Long life Compression type glass seal High pressure solder seal POTENTIAL APPLICATIONS Gas analysis instruments Gas/Airflow detection Thermal conductivity analysis Temperature sensing and monitoring equipment Vacuum sensing equipment DESCRIPTION Medical electronics Honeywells 115 Series E-I Matched Bead Thermistors are Industrial controls built using the 111 Series Small Bead Thermistors that are Test equipment hermetically sealed in glass. They feature relatively uniform size, offer fast time response, and are highly sensitive to temperature PORTFOLIO changes and airflow movements. They are often suited for use in Honeywell offers 18 series of thermistors, as well as a broad low heat capacity applications, and their small size allows them spectrum of thermal products. The entire breadth of Honeywells to be used in confined locations. thermistor series can be viewed here. In the 115 Series, Honeywell has taken the Small Beads performance and reliability and mounted them to a special hermetically sealed header to facilitate ease of installation. For maximum sensitivity, the higher resistance units should be used at higher ambient temperatures. VALUE TO CUSTOMERS Less expensive to implement than most other gas analyzing technologies 2000 and 8000 Ohm decades available Thermistor pairs are precision matched to one another which eliminates the need for performing individual thermistor calibrations DIFFERENTIATION This technology is non-destructive to mediums being measured Can be utlized in gas streams that are in constant use Versatile for detecting a variety of gases that have different thermal conductivities than the carrier gas (most other technologies are dedicated to one particular gas or medium) Sensing and Productivity SolutionsE-I Matched Bead Thermistor, 115 Series Table 1. Specifications Characteristic 115-202CDK-801 115-802EDJ-801*, 115-802EDJ-802 Two 111-802EAJ-H01 each mounted on a Two 111-202CAK-H01 each mounted on a glass hermetic sealed header and matched Description glass hermetic sealed header and matched in helium* or air to within millivolts of each in air to within 10 mV of each other other at 2 mA, 5 mA, 10 mA, and 15 mA Matched to 2 % resis. at 25 C 77 F Resistance at 25 C 77 F 2000 Ohms 25 % 8000 Ohms 20 % Resistance at 0 C 32 F approx. 5000 Ohms 22800 Ohms Resistance at 50 C 122 F approx. 910 Ohms 3240 Ohms Ratio of resistance 4.95 to 6.95 6.34 to 7.74 0 C/50 C BETA 0 C/50 C (nominal) 3000K 3442K Temperature coefficient 25 C 77 F -3.4%/C -3.9%/C T/C still air max.** 0.5 second 0.5 second D.C. still air** 0.16 mW/C 0.16 mW/C D.C. helium** 0.5 mW/C 0.5 mW/C Power ratio (air) 15 mW 45 mW Power ratio (helium) 60 mW 140 mW Max. ambient temp 100 C 212 F 250 C 482 F Max. operating temp. 150 C 302 F 300 C 572 F (including self-heat) Resistance at max. operating temp. 85 Ohm 25 Ohm 1 1 Pair matched Ro at 25 C 77 F 5 % 2 % * helium at 25 C 77 F to 1 20 mV at 2 mA 1 15 mV at 5 mA still air at 25 C 77 F to 1 10 mV at 15 mA 1 10 mV at 5 mA EI pair matching 1 10 mV at 10 mA still air at 25 C 77 F to 1 10 mV at 15 mA 1 20 mV at 2 mA 1 15 mV at 5 mA 1 10 mV at 10 mA Standard matched tolerance. Other tolerances available, please contact Honeywell for details. Non-matched options on header also available, please contact Honeywell for details. **D.C. Power in milliwatts required to raise thermistor temperature 1 C **T/C Time required for thermistor to indicate 63 % of a new impressed temperature. E-I, 115 SERIES DIMENSIONS mm in for reference only Figure 1. E-I 115 Series Dimensions 12,7 33,32 1.312 0.50 Glass insulation 2,36 0.093 4,72 9,58 0.186 0.377 8,33 0.328 Leads (2) Ring, steel 0,762 0.03 Thermistor nickel-iron alloy 2 sensing.honeywell.com