TQ412 111-412-000-013 A1-B6-E050-F2-G050-H05

Product Overview

The model code analysis of TQ412 111-412-000-013 A1-B6-E050-F2-G050-H05 is as follows:

111-412-000-013: Basic product number, clearly marked as TQ412 series sensor

A1: Environmental option, indicating the standard industrial version, without explosion-proof (Ex) certification, suitable for general industrial environments

B6: Thread type, indicating 3/8 "-24 UNF imperial thread. This is a fine-threaded uniform thread specification that is very common in the North American market

E050: Built-in cable length, indicating an integrated FEP coaxial cable of 5.0 meters ± 0.5 meters

F2: Optional protection, indicating a flexible stainless steel hose with FEP sheath. This provides excellent mechanical protection and chemical protection

G050: Flexible hose length, indicating a protective hose that is 5.0 meters long

H05: Total system length, indicating that this sensor is designed to form a complete measurement chain of 5 meters. Under this configuration, since the built-in cable is already 5 meters long, there is usually no need to extend the cable EA402 additionally

Applicable industry scope

This model TQ412 is not a general-purpose sensor but is tailor-made for the cross-requirements of specific equipment standards and high-risk industrial environments.

The North American energy and power industry

Typical equipment: F-class/HA-class gas turbines and supercritical coal-fired steam turbines manufactured by manufacturers such as GE and Westinghouse

Specific application points

The internal space of the compressor/turbine bearing housing is extremely narrow, and there is a risk of high-temperature gas leakage. The reverse installation design of TQ412 allows the cable to be led out from the tail along the cooling air duct, avoiding the high-temperature area. The F2 hose can withstand heat radiation at temperatures above 150°C and lubricating oil splashes.

The axial displacement of the generator's excitation end sealing bearing needs to be monitored to prevent hydrogen leakage. This area is filled with a hydrogen-oil mixture. The FEP sheath can resist the long-term erosion of sealing oil, and the stainless steel hose is protected from accidental cuts by maintenance tools.

Working condition challenges: thermal shock during startup and shutdown (-20°C to +180°C), strong electromagnetic interference, and continuous vibration.

The B6 thread of this model perfectly matches the original OEM factory hole position and does not require tapping modification. F2 protection ensures maintenance-free operation during a major overhaul cycle of up to 8 to 10 years.

Petrochemical industry

Typical equipment includes ethylene cracking gas compressors, hydrogenation treatment circulating hydrogen compressors, and large-scale catalytic cracking main fans.

Specific application points

The inter-stage seals inside the compressor cylinder can be used to monitor the rotor alignment status. Here, there are strong corrosive media such as H₂S, NH₃, and amine liquid. FEP sheath is one of the few materials that can resist these chemicals for a long time.

The environment near the inlet guide vane actuator of the FCC main fan is filled with catalyst dust, which is highly abrasive. The stainless steel hose forms a physical barrier to prevent dust from entering the cable and causing insulation failure.

Working conditions challenges: chemical corrosion, dust erosion, high temperature, and potentially explosive environments.

The F2 configuration of this model is the only reliable solution to deal with the dual threat of "chemistry + erosion". The 5-meter built-in cable avoids adding connection points in dangerous areas and conforms to the principle of intrinsically safe wiring.