Endevco 4416B

The Endevco 4416B is a portable, battery-powered signal conditioner engineered for Isotron® (IEPE-type) transducers and piezoelectric transducers equipped with Remote Charge Converters (RCC). It delivers a constant current excitation source, low-noise signal amplification, and selectable gain settings - making it suited for field vibration measurement and condition monitoring where mobility and operational autonomy are essential.

Technical Specifications Input Stage

Single-ended constant current two-wire configuration

Input impedance: > 20 kΩ

Excitation current: 4.7 mA ±20%

Compliance voltage: > 20 V Output Stage

Single-ended output referenced to circuit ground

Output impedance: < 10 Ω in series with minimum 40 μF

Linear output voltage: ≥ 10 V peak-to-peak (≥ 3.535 V rms)

Linear output current: ≥ 2.0 mA peak-to-peak Transfer Function

Gain: ×1 or ×10 selectable (4416BM1 variant without gain stage available)

Gain accuracy: ±1.5% across temperature and time variations

Frequency response within ±5%: 1 Hz to 20 kHz (normalized to 100 Hz)

Lower cutoff: -3 dB maximum at 0.3 Hz; -5% at 1 Hz

Connectors: BNC input and output (EJ21 adapter enables 10-32 cable connection) Power & Battery

Three onboard rechargeable nickel-cadmium batteries

Minimum battery runtime: 8 hours continuous operation

External 12 VDC supply: 160 mA minimum

Recharge cycle: 3 hours minimum (unit off); 6 hours minimum (unit on)

Unit operable during recharge cycle Environmental

Operating temperature: 0°C to +50°C

Storage temperature: -40°C to +50°C

Recharge temperature: +15°C to +50°C

Humidity rating: 95% R.H.

Key Features

Real-time transducer status indication via tri-state LED (green = normal; red = input short; off = open/removed/low battery)

Compact, field-deployable architecture requiring no external laboratory infrastructure

Dual-gain configuration for signal optimization across measurement ranges

Extended battery life minimizes field recharge frequency

Typical Applications

Portable vibration analysis and machinery condition monitoring

Field data acquisition from Isotron transducers in industrial environments

Remote sensing applications where AC line power is unavailable

Compatibility & Integration Designed exclusively for Isotron® (IEPE) transducers and charge-output piezoelectric transducers paired with Remote Charge Converter modules.