I. Model Explanation (330280-015-00)

330280: 3300 XL 8mm preamplifier, 300Ω low impedance version

015: Total system length 1.5 meters (probe + extension cable + preamplifier internal)

00: Standard configuration, no explosion-proof, no special calibration

The conventional 8mm preamplifier is 75Ω (model 330100-xxx-00); 330280 is 300Ω, used for old systems compatibility / special long-distance / low-noise scenarios.

II. Core Parameters (Electrical / Mechanical)

Electrical (300Ω, 8mm system)

Sensitivity: 7.87 mV/μm (200 mV/mil)

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

Frequency response: 0 - 10 kHz (±3dB)

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

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

Impedance: 300Ω (different from the ordinary 75Ω)

Calibration target surface: 4140 steel (default) Mechanical

Installation: Panel mounting (standard), optional DIN rail

Terminal: SpringLoc spring terminals, tool-free wiring

Enclosure: Engineering plastic + metal base, with isolation

Dimensions: Approximately 114×41×27 mm

Weight: Approximately 200 g Environment

Operating temperature: -40℃ to +85℃

Storage temperature: -55℃ to +100℃

Protection: IP20, indoor installation

III. System Accessories (must be 300Ω matched)

Preamplifier: 330280-015-00 (1.5m, 300Ω)

Probe: 330281-xx-xx (8mm, 300Ω)

Extension cable: 330282-015-00 (1.5m, 300Ω)

Monitoring card: 3500/40, 3500/42, 3500/45 (compatible)

⚠️ Cannot be used with ordinary 75Ω (330100 series) at the same time, otherwise the linearity and accuracy will be lost.

IV. Typical Applications

Upgrade of old equipment: Replace the 7200 series 300Ω system, retain the original probe / cable

Long-distance signal transmission: 300Ω has stronger anti-interference ability, suitable for 10 to 15m wiring

Scenarios with low noise requirements: such as precise bearing vibration, low-speed shaft displacement monitoring

Compressors, fans, pumps: shaft vibration / shaft position monitoring of oil film bearing units

V. Differences from ordinary 8mm preamplifiers (330100)

Table

Parameters: 330280 (300Ω)  330100 (75Ω)

Impedance: 300Ω  75Ω

System length: 1.5m / 3m / 5m  5m / 9m / 14m

Compatibility: Only 300Ω probe / cable  Only 75Ω probe / cable

Interference resistance: Strong (suitable for long distances)  Standard (for regular applications)

Price: Approximately 15% - 20% higher  Standard

Six. Selection Tips

This model: 1.5m total length + 300Ω + panel installation, suitable for short distances, replacement of old systems, and low-noise scenarios.

Common variants:

330280-030-00 (3m, 300Ω)

330280-050-00 (5m, 300Ω)