TQ902 vs TQ402: Order Code Changes, Replacement & Application Guide for Proximity Sensors

زمان: September 11, 2026

TQ902 111-902-000-011 and TQ402 111-402-000-013 part numbers are always by a lengthy order number string. These ordering numbers are quite important, as each code represents the configuration of the sensor. From these codes, the operating environment, body length, unthreaded length, cable protection and total system length can be read directly.

However, with the upgrade from TQ402 to TQ902, some ordering codes have also changed accordingly. The environment code A is simplify, since it may be hard to determine which explosive zones the sensors will be installed in by the clients. The codes for Body length(C), unthreaded length(D), integral cable length(E) and flexible hose length(G) are numerical and the units all converted to mm. The cable protection code F has been simplify as well, reduce the options down to 5. Unthreaded length code D is changed from D000 to D2, with a new minimum value of 2 mm.

The below form shows the difference of the ordering number:

Coding	TQ902 111-902-000-011	TQ402 111-402-000-013	Comments
A:Environment	A5	A2	A unique coding for all Ex certifications
B:Body thread	B1	B1	——
C:Body length	C20	C020	Numerical value in mm
D: Unthreaded length	D5	D005	Numerical value in mm
E: Integral Cable	E5000	EO50	Numerical value in mm
F:Protection	F2	F1	A unique cable profection
G: Flexible hose length	G3000	G030	Numerical value in mm
H: Total System length	H05	H05	——

For example: TQ402 111-042-000-013 A3-B6-C050-D000-E100-F1-G100-H10 upgrade to TQ902 is 111-902-000-011 A5-B6-C50-D2-E10000-F2-G10000-H10.

Q&A:
1. Can the TQ902 fully replace the TQ402?
Yes, TQ902 is form, fit and functionally equivalent replacement. It meet or exceed the performance of TQ402.

2. What are the application scenarios for the TQ902?
For non‑contact measurement of shaft relative vibration and axial gap/position on steam, gas, hydraulic turbines, alternators, turbocompressors and pumps.

3. Does the TQ902 intergral cable length equal the total system length?
The Total system length (H) = Integral cable length (E) + EA 402 extension cable length.

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