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　　I. Core Structure and Principle

　　Sensing Core: Centrally symmetrical shear piezoelectric ceramic, electrically isolated shell, extremely low base strain, low thermal drift, and strong long-term stability.

　　Split Transmitter Structure

　　Probe + stainless steel corrugated shielded cable + independent built-in transmitter box, fully sealed and welded;

　　The transmitter unit has a built-in charge-to-current circuit, eliminating the need for an external charge amplifier;

　　2-wire modulated current output, anti-interference, ultra-long-distance transmission.

　　Protection Level: Overall airtight welding, resistant to lubricating oil, cooling water, steam, and dust.

　　II. CE281 Core Electrical/Mechanical Parameters

　　1. Signal and Sensitivity

　　Sensitivity: 10 μA/g ±5% @120Hz

　　Output System: 2-wire constant current modulation output

　　Power Supply: 12～28 VDC, static baseline current 3～8 mA

　　Dynamic Range: 0.0001～200 g (peak), instantaneous shock resistance 2000 g

　　Linearity: ≤1% full range; lateral sensitivity ≤3%

　　2. Frequency Response

　　Operating Bandwidth: 3 Hz ～ 7000 Hz (±5% error)

　　Installation Resonant Frequency: 25 kHz

　　3. Environmental Temperature Resistance

　　Continuous Operation: -55 ℃ ～ +260 ℃

　　Short-term tolerance to higher temperatures, suitable for high-temperature gearboxes and compressor housings

　　4. Transmission Distance

　　Maximum wiring length 1000 Meters, suitable for long-distance monitoring of large-scale plant units

　　5. Explosion-proof certification

　　Complete ATEX / IECEx / cCSAus explosion-proof certifications: Ex ia, Ex nA, suitable for Zone 1 / Zone 2 flammable and explosive conditions (oil and gas, chemical, power plants) Vibro-Mete... 6. Mechanical

　　Weight: Approximately 70 g

　　Installation: Double-ear flange bolt fixing

　　Material: All stainless steel, corrosion resistant

　　III. Core Advantages

　　High temperature adaptability: Continuous operation at 260℃, far superior to conventional IEPE sensors (≤120℃);

　　Long-distance stable transmission: Current output is not affected by cable resistance and distributed capacitance, no signal attenuation over kilometers;

　　Intrinsically safe explosion-proof, standard equipment for chemical and power plant turbine units;

　　Split structure: High-temperature probe is kept away from the transmitter circuit, electronic components are not affected by high-temperature aging;

　　Fully sealed and waterproof against oil and vapor, suitable for gearboxes and compressors immersed in oil/ Spraying environment;

　　Low base strain minimizes measurement errors caused by installation stress.

　　IV. Typical Application Scenarios

　　Power Plants: Gas turbine auxiliary equipment, gearboxes, boiler fans, water pumps;

　　Petrochemical Industry: Reciprocating compressors, screw compressors, booster pumps;

　　Heavy Industry: Large reduction gearboxes, blast furnace fans, circulating water pumps;

　　Hazardous Operating Conditions: Status monitoring of rotating equipment in explosion-proof areas, unit protection interlocks.

　　V. Differences within the Series

　　CE281 (Main Model): 10μA/g, 7kHz, -55~260℃, general high-temperature explosion-proof monitoring;

　　CE28 Other Derivative Models: Subdivided by cable length, flange installation dimensions, and explosion-proof rating, with the same core electrical architecture;

　　Comparison with CA280 from the same manufacturer: CA280 is a bare charge output probe, requiring an external charge amplifier; 444-311-000-123 has built-in transmitter and current output, simplifying field wiring.

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