4102M, 4102B - Miniature Temperature Detectors

Features

The protection of bearings, shafts, and other moving parts from damage due to unsafe high temperature levels.

● RELIABLE PROTECTION

● INSTANT RESPONSE

● SMALL SIZE

● EASE OF INSTALLATION

● SIZE SELECTION

Applications

● HIGH BEARING AND FLUID TEMPERATURE DETECTION

● POWER OR COMPRESSOR CYLINDER OVERLOAD

● HIGH PACKING GLAND TEMPERATURE DETECTION

Operation

AMOT Model 4102 Miniature Temperature Detectors, like the 4103 Valve Series, incorporate an old heat detecting principle to provide a safety device suitable for modern low and medium speed engines. A thin film of eutectic alloy, less than 0.001 cubic inch in volume, secures a spring loaded fuse rod until the temperature at the sensing end of the rod melts the alloy. The fuse rode is then instantly released and moves outward 1/4". This instant response, in addition to relatively small size, makes the 4102 ideal for use in moving parts such as connecting rod bearings which must be protected from excessive temperatures. Such temperatures may arise from tight, worn or out-of-round bearings, tight packing glands, cracked or broken shafts, torsional vibration, power or compressor cylinder overload, lack of lubricant flow and many other sources.

These devices have been thoroughly field tested by AMOT and several of the largest engine and compressor users. They have proven accurate and reliable in many types of engines in gas compression, power generation, pipeline, marine and general industrial service. They have the most efficient response of any mechanical device now in use. Due to their small eutectic mass, the detectors are nearly as responsive as, and in some cases, more reliable than thermocouples. AMOT Model 4102 Miniature Temperature Detectors do not require the impractical electrical wiring of electrical sensors.

To convert the detector tripping action into a usable signal, an AMOT Model 4095 Vent Valve is required as shown in Fig. 1.

AMOT Model 4102 Temperature Detectors are designed for use in moving parts such as connecting rod bearings. For stationary bearing applications, refer to AMOT model 4103 in which the vent valve is incorporated in the temperature detector.