C03BT4

The C03BT4 is a charge-mode (PE) ultra-high-temperature accelerometer built on ultra-high-temperature piezoelectric ceramics with an ultra-low sensitivity temperature coefficient and high impedance maintained right up to 260 °C. With 20 pC/g charge sensitivity and a ±1,000 g range it is the mid-sensitivity 260 °C member of the family. Typical uses include engine and exhaust vibration, turbine and turbocharger testing, high-temperature industrial monitoring and thermal-cycle rigs to 260 °C.

With no built-in electronics the sensor works from −55 °C to +260 °C and pairs with any charge amplifier, which sets the low-frequency limit of the system. A special high-temperature nickel-based alloy housing and matched piezoelectric material keep temperature drift low, and the signal ground is isolated from the housing for a differential output that rejects interference on long cable runs from hot zones. The laser-welded 33.7 × 30.2 × 25.3 mm housing weighs 62 g, is sealed to IP68, bolts down through three ⌀4.6 mm through-holes in a stable triangular pattern with M4 screws torqued to 1.8 N·m, and carries an industry-standard 7/16-27 two-pin connector, compatible with domestic and international high-temperature metal cables.

Rated to 260 °C

Ultra-high-temperature piezoceramics with an ultra-low sensitivity temperature coefficient keep the C03BT4 reading accurately from −55 °C to +260 °C, with ≥ 10¹⁰ Ω insulation resistance held at temperature and 1,300 pF capacitance into any charge amplifier. No internal electronics, so nothing to fail in the heat.

Differential, isolated output

Signal ground isolated from the housing (≥ 10¹⁰ Ω) with a two-pin differential output, so long metal-sheathed cable runs from engine bays and turbine casings stay free of ground loops and pickup. ±5% response over 1 – 9k Hz (±10% over 1 – 11k Hz), resonance ≥ 45 kHz, ≤ 5% transverse sensitivity.

Nickel alloy, triangular mount

Laser-welded nickel-based alloy 33.7 × 30.2 × 25.3 mm housing weighing 62 g, sealed to IP68 and rated to 2,500 g rms vibration and 4,000 g pk shock. Three ⌀4.6 mm through-holes give a stable, easy triangular fixing with M4 screws, and the 7/16-27 two-pin connector takes standard high-temperature metal cables.

Key specifications