I. Model Explanation (330303-20-50-90-00-00)

330303: 16mm high-temperature resistant probe (HTPS), 3/4-16 UNF thread, hard wire cable

20: Threadless length 20mm (bare section)

50: Total length of the housing 50mm

90: 9 meters stainless steel hard wire cable (integrated and cannot be shortened)

00: No explosion-proof certification / No special options

00: Standard configuration (no additional customization)

II. Core Parameters (Electrical / Mechanical / High Temperature)

Electrical (consistent with 3300 XL 16mm)

Sensitivity: 7.87 mV/μm (200 mV/mil)

Linear range: 0.25 - 2.3mm (10 - 90 mil)

Frequency response: 0 - 10kHz (±3dB)

Power supply: -24V DC (-22 - -26V), 12 - 20mA

Output: -4 - -20V DC (gap voltage)

Impedance: 75Ω Mechanical

Thread: 3/4 - 16 UNF external thread

Shell: 316L stainless steel, gas-tight seal

Probe end: Ceramic (high-temperature resistant, insulation)

Cable: 304L stainless steel hard wire, 9m integrated

Installation torque: ≤ 81 N·m (720 in-lb)

Weight: Approximately 1.1kg (including 9m cable)

High-temperature characteristics (key points)

Operating temperature: -34℃ ～ +350℃ (long-term continuous)

Storage temperature: -55℃ ～ +370℃

Application scenarios: Gas turbines, steam turbines, high-temperature compressors (ordinary probes with a maximum temperature of ≤ 150℃ cannot be used)

III. Standard Accessories (Complete HTPS System)

Probe: 330303-20-50-90-00-00 (9m hard wire)

Preamplifier: 330380-90-00 (9m total length, panel-mounted)

Extension cable: 330330-XX-XX-XX (as needed, total length ≤ 15m)

Monitoring card: 3500/40 (displacement), 3500/42 (shaft expansion)

IV. Typical Applications (High-temperature Conditions)

Steam turbine: Near labyrinth seal, inter-stage gap, shaft expansion measurement

Gas turbine: Exhaust channel, high-temperature bearing box, rotor vibration

Industrial compressor: High-temperature shell, shaft displacement, axial movement

Metallurgy / high-temperature pump: Axial vibration / position monitoring in ≥ 200℃ area

V. Difference from ordinary 16mm probe (330104)

Temperature: 330303 = 350℃; 330104 = 150℃ (maximum)

Cable: 330303 = stainless steel hard wire; 330104 = flexible coaxial

End: 330303 = ceramic; 330104 = plastic / epoxy

Price: HTPS is approximately 2.5 to 3 times that of ordinary probe

VI. Selection Tips

This model: Short shell (50mm) + 20mm optical rod + 9m hard wire, suitable for compact installation space + high temperature + long-distance wiring scenarios.

Common variants:

330303-30-60-50-00-00 (30mm optical rod, 60mm shell, 5m cable)

330303-00-130-90-00-00 (0 optical rod, 130mm long shell, 9m)