SIMCO FMX-004 Handheld Electrostatic Fieldmeter | 0–±30 kV, LED ranging lights at 25 mm, ±10%, ion balance ±300 V (with ion balance plate)

SIMCO FMX-004 Handheld Electrostatic Fieldmeter: 0–±30 kV

Overview

The FMX-004 is a handheld electrostatic fieldmeter from Simco-Ion (USA), sold in Japan by SIMCO JAPAN. It measures surface static voltage at a distance of 25 mm from the object; the correct distance is reached when the two LED ranging lights converge. Hi, Low or auto ranging can be selected; a 3-digit display with a red (positive) / blue (negative) bar graph indicates polarity, with Hold and zero functions. With the ion balance plate fitted, it measures the ion balance of ionizers. The housing is conductive ABS resin; an analog output cable and stand kit are optional.

Key Specifications

• Measuring range: Hi 0–±30.0 kV; Low 0–±3.00 kV; Auto 0–±1.49 kV (low range), ±1.0–±30.0 kV (high range); ion balance 0–±300 V (ion balance plate required)
• Measuring distance: 25 mm ±0.5 mm (LED ranging lights)
• Accuracy and response: ±10%; response time within 1 s; display updates 5 times per second
• Display and operation: 3 digits; positive/negative polarity bar graph; Hold; 4-step battery indicator; power, zero, mode and Hold keys; beeper for over-range and auto power-off
• Power: 9 V alkaline battery, approx. 30 h; auto power-off after 5 min (can be disabled)
• Dimensions and weight: 123 × 73 × 25 mm (with balance plate); 0.17 kg (with battery and balance plate)
• Operating environment: 10–40 ℃, 0–60% RH non-condensing; annual calibration recommended

Applications

• Static voltage checks on electronics assembly, semiconductor and display panel production lines.
• Verifying the ion balance of ionizing blowers and ionizers.

Specifications per the Simco-Ion FMX-004 product page and datasheet DS-FMX004_V4 (2023-11) (simco-ion.com, retrieved 2026-10-24).