E-I Matched Bead Thermistor
115 Series
009096
Datasheet
FEATURES
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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
Issue 1
POTENTIAL APPLICATIONS
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Gas analysis instruments
Gas/Airflow detection
Thermal conductivity analysis
Temperature sensing and monitoring equipment
Vacuum sensing equipment
Medical electronics
Industrial controls
Test equipment
DESCRIPTION
Honeywell’s 115 Series E-I Matched Bead Thermistors are
built using the 111 Series Small Bead Thermistors that are
hermetically sealed in glass. They feature relatively uniform size,
offer fast time response, and are highly sensitive to temperature
changes and airflow movements. They are often suited for use in
low heat capacity applications, and their small size allows them
to be used in confined locations.
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.
Honeywell offers 18 series of thermistors, as well as a broad
spectrum of thermal products. The entire breadth of Honeywell’s
thermistor series can be viewed
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 Solutions
HONEYWELL [ HONEYWELL SOLID STATE ELECTRONICS CENTER ]
