4W/20W Analog Standing Wave Meter Head | SWR Watt RF Power Meter for Radio Transmitter

Full Product Description

Construction & Appearance

Magneto electric system serves as core driving structure. Pointer: Nickel foil copper connected aluminum hollow tube, carbon fiber black Dimensions: Length 51.0mm ±0.5mm, Width 0.3mm ±0.1mm Pointer stays aligned with bilateral zero calibration marks under power-off condition. Upper housing: ABS+PMMA; Lower housing: HIPS; Nameplate: Aluminum plate No B board and bulb; Operation mode: Vertical mounting.

Main Performance Parameters

• Internal DC Impedance: 1500Ω ±10%
• Calibration Tolerance: ±5%
• Relative Error: ±5%
• Mechanical Zero Offset: ±1mm
• Friction Error: ±1mm
• Balance Error: ±1.5mm
• Damping Time: 2–3 seconds
• Insulation Resistance: ≥50MΩ (DC 500V test)

Testing Criteria

Standard test condition: 20℃, 70% RH. Acceptable to test under ambient temperature. Overcurrent resistance test supports instantaneous 2× full-scale surge current. After 7 seconds overload, pointer should recover within half full scale range.

This meter movement is designed to assemble wireless radio standing wave meter, SWR watt meter and RF power transmitter measuring gauges, excellent spare core component for instrument production and maintenance.