Dytran Model 3262C high-temperature accelerometer

Dytran Instruments has released the model 3262C, a high-temperature differential output accelerometer that operates at up to +649°C, and can survive temperature excursions up to 760°C.

Each aspect of this model is designed for high performance and extended durability in the harshest high-temperature environments. The case isolation, cooling channel, hermetically sealed super alloy Inconel 600 housing and patented Silver Window technology make the model 3262C suitable for permanent vibration monitoring of gas turbine engines, space applications, nuclear applications, gas and steam turbine power plants.

Dytran’s Silver Window technology is a key feature of model 3262C. The window on top of the accelerometer housing allows diffused oxygen molecules to pass through at high temperatures, replenishing oxygen to the piezoelectric crystals while maintaining the hermetic seal integrity. This feature assures continued high-temperature operation with minimal loss of piezoelectric crystal insulation resistance due to oxygen deprivation.

The crystal design topology allows model 3262C to exist in rapidly changing thermal environments by exhibiting a high resistance to thermal shocks. The internal components of model 3262C are made from high-temperature alloys that are tuned to a perfect match of thermal coefficients of expansion to stabilise temperature response characteristics. The sensing element is electrically isolated from the external case to avoid signal ground loop interference.

Basic sensitivity is 5 pC/g, the frequency response is ±10% to 5 kHz.