Here is a detailed description and selection suggestion for the common length specifications (600mm, 800mm, 1000mm, 1200mm) of imported oxygen sensors (oxygen probes):

1. Standard Specifications and Application Scenarios

　　600mm

Application: Suitable for industrial furnaces, small heat treatment equipment, or laboratory setups with limited space.

Features: Flexible installation, quick response, but may not be suitable for deep-well furnace bodies.

　　800mm

Application: Medium-sized industrial furnaces, boilers, or combustion systems (such as ceramic kilns, glass melting furnaces).

Features: Balances length and rigidity, suitable for most standard operating conditions.

　　1000mm

Application: Large boilers, steel smelting furnaces, or high-temperature environments requiring deep measurement.

Features: Pay attention to the probe's heat shock resistance to avoid mechanical stress due to excessive length.

　　1200mm

Application: Extra-deep furnace bodies (such as cement rotary kilns, waste incinerators).

Features: Generally requires custom support structures for stability; may require extended cable lengths.

2. Key Selection Parameters

Temperature Range: Confirm probe material (such as zirconia) is compatible with furnace temperature (commonly 600℃~1400℃).

Installation Methods: Threaded fixed (e.g., 1.25 NPT), flange connection, or straight-through type.

Output Signal: Analog (4-20mA/0-10V) or Digital (RS485).

Protection Rating: IP65/IP67 (Dust and Water Resistant).

4. Important Notes

Thermal Expansion Compensation: For extra-long probes (such as 1200mm), an expansion gap should be reserved.

Calibration Cycle: Imported probes usually require calibration every 6 to 12 months, with shorter intervals in high-temperature environments.

Maintenance: Avoid dust accumulation and clogging of reference gas apertures, and regularly inspect electrode aging.