Honeywell 121-202EAC-Q01 NTC Thermistor Probe Guide
The Honeywell 121-202EAC-Q01 thermistor probe is a well-defined part in the Honeywell 121 Series and is commonly referenced for temperature measurement in industrial and engineered systems. Public distributor data identifies it as an NTC thermistor with a 2 kOhm nominal resistance and a standard glass probe format, which immediately makes it relevant for applications where compact size, environmental resilience, and stable sensing behavior are priorities.
What Is the Honeywell 121-202EAC-Q01?
The Honeywell 121-202EAC-Q01 NTC thermistor probe is part of Honeywell’s 121 Series temperature-sensing family. NTC stands for negative temperature coefficient, meaning the resistance decreases as temperature rises. That predictable response makes NTC thermistors popular in measurement, compensation, and protection circuits.
Technical Features of the Honeywell 121-202EAC-Q01 Thermistor
Available channel information identifies several useful characteristics. This part is listed as a 2 kOhm probe thermistor, and Honeywell 121 Series references describe the family as a rugged, glass-encapsulated design suited for demanding environments. The family is also associated with a B-constant of 3518 K for comparable 2 kOhm 121 Series variants, along with a minimum operating temperature of -60°C and a 50.8 mm lead length in the standard glass-probe format.
Those details matter because they point to a component intended for repeatable thermal response, mechanical durability, and straightforward integration into control assemblies. Engineers often value glass-encapsulated thermistors because they handle harsh conditions better than more fragile alternatives and can be used in immersed or air-sensing assemblies depending on system design.
Common Applications
The Honeywell 121-202EAC-Q01 temperature sensor is relevant in industrial equipment, HVAC controls, fluid-related measurement points, environmental monitoring assemblies, and protection circuits. It is particularly useful where designers need a compact probe that can support dependable temperature tracking over time.
Another reason this part is frequently searched is lifecycle planning. Distributor channels show active references and authorized sourcing visibility, which helps procurement teams and maintenance departments support installed equipment without relying on vague generic substitutions.
Why the Honeywell 121-202EAC-Q01 Stands Out
What makes this code especially useful from a documentation standpoint is that its public description is clearer than many niche industrial parts. Engineers can confirm both the sensing type and the probe format quickly, which reduces ambiguity during replacement, redesign, or parts verification.
FAQ
What type of sensor is the Honeywell 121-202EAC-Q01?
It is an NTC thermistor probe used for temperature sensing.
What is the nominal resistance of the Honeywell 121-202EAC-Q01?
Public distributor references identify the part as a 2 kOhm probe thermistor.
Is the Honeywell 121-202EAC-Q01 part of a broader product family?
Yes. It belongs to the Honeywell 121 Series, a family associated with standard glass-probe thermistors designed for rugged use.
Why is the glass-probe construction important?
Glass-encapsulated thermistors are valued for durability, environmental resistance, and stable long-term sensing behavior in technical applications.
Where can I read more about Honeywell products?
For more information about Honeywell, reviewing the broader Honeywell product family alongside the exact 121-202EAC-Q01 listing is a practical next step.