MeterMate 40kV Probe

Measure. Discharge. Verify.

$190

Lead time: 6 weeksSKU: MM-40K-PROBE

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Specifications

Maximum input	±40 kV DC
Divider ratio	10,000:1
Scaling	10 kV input = 1.000 V output
Accuracy	±5%
Divider network	Precision 500 MOhm resistor network
Compatible meter input impedance	10 MOhm
Meter connection	Red (+) and black (-) safety banana leads
Ground connection	Separate green earth-ground lead
Contact electrode	Polished aluminum sphere
Probe body	Black high-dielectric shaft with extended insulated blue handle
Hand guard	Oversized semitransparent plastic guard disc
Measurement type	DC voltage only

High-voltage measurement with a familiar meter

Measuring kilovolt-level DC should not require a dedicated high-voltage meter for every workstation. MeterMate scales the applied voltage to a low-voltage signal that can be read by a compatible digital multimeter with 10 MOhm input impedance. The conversion is intentionally simple:

1 kV at the probe displays as 0.100 V
10 kV at the probe displays as 1.000 V
30 kV at the probe displays as 3.000 V
40 kV at the probe displays as 4.000 V

Multiply the meter reading in volts by 10,000 to obtain the measured voltage in volts. The sign displayed by the meter indicates the measured polarity.

10 kV at the probe = 1.000 V at the meter

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Built for practical high-voltage work

±40 kV DC measurement range

Measure positive or negative DC voltages up to 40,000 V for power-supply setup, equipment troubleshooting, and system verification.

10,000:1 divider ratio

The precision 500 MOhm divider network converts high voltage to a meter-friendly signal. Every 10 kV at the probe produces a nominal 1 V reading on a compatible 10 MOhm multimeter.

Extended insulated handle

The lightweight blue handle gives the operator reach while helping maintain separation from the energized test point.

Protective guard disc

The oversized semitransparent guard provides a clear hand-position boundary and helps reduce the risk of surface tracking toward the handle during proper use.

Spherical contact electrode

The polished aluminum sphere distributes the electric field more evenly than a sharp point. It provides a smooth contact surface for measurement and can support controlled discharge procedures when used as directed.

Direct DMM connection

Red and black safety banana leads connect to a handheld or benchtop digital multimeter. A separate green lead provides the required earth-ground connection.

One tool, three essential checks

Measure

Check the output of high-voltage power supplies and energized systems up to ±40 kV DC using a compatible 10 MOhm digital multimeter.

Discharge

Use the spherical electrode as part of the prescribed grounding and discharge procedure to remove residual charge before handling or servicing equipment.

Verify

Measure again after shutdown and discharge to confirm that the voltage has fallen to a safe level before work begins.

Important: Never assume that a system is de-energized because it has been switched off. High-voltage capacitors and cables can retain hazardous charge. Always discharge using an appropriate procedure, then verify by measurement.

Research applications

High-voltage DC power supplies
Electrospinning and electrospraying systems
Electrostatic and ionization equipment
Laboratory prototypes and research apparatus
X-ray and imaging power subsystems
Tesla-coil and pulsed-power development benches, when measuring steady DC nodes within the probe's ratings
Field service, maintenance, and equipment verification
Educational high-voltage demonstrations under qualified supervision

Included system components

MeterMate 40 kV High-Voltage Probe
Integrated red and black safety banana leads for the digital multimeter
Green earth-ground lead
Digital multimeter (actual model is subject to change)

Product-image note: The digital multimeter shown in product photography is representative. The included brand, model, color, and appearance may change based on availability. The supplied meter will meet MeterMate's stated compatibility requirements.

Multimeter compatibility

MeterMate includes a compatible digital multimeter. If using another meter, the following are required for the stated 10,000:1 scaling and accuracy:

10 MOhm input impedance on the selected DC-voltage range
A DC-voltage range capable of reading at least ±4.000 V
Insulated input terminals compatible with the supplied safety banana plugs
Adequate resolution for the measurement uncertainty required by your application

The multimeter remains at low potential; it does not need a 40 kV input rating. The probe, leads, grounding, work area, and operating procedure must nevertheless be suitable for the high-voltage source being tested.

Basic connection sequence

De-energize the high-voltage source and follow the equipment manufacturer's lockout and discharge procedure.
Inspect the probe, guard, electrode, cables, insulation, and connectors. Do not use damaged, contaminated, or wet equipment.
Connect the green lead to a verified earth-ground point.
Connect the red and black banana leads to the appropriate voltage and common inputs of a compatible 10 MOhm digital multimeter.
Select an appropriate DC-voltage range and confirm the meter setup before energizing the source.
Keep hands behind the guard disc and maintain appropriate clearances from all energized conductors.
Contact the intended test point with the spherical electrode and read the meter.
Multiply the displayed voltage by 10,000 to obtain the high-voltage value.
After the source is switched off, follow the prescribed discharge procedure and measure again to verify the remaining voltage.

This overview does not replace the product manual, the source-equipment instructions, or your organization's high-voltage safety procedures.

Can MeterMate measure both positive and negative voltage?

Yes. MeterMate measures DC voltage from −40 kV to +40 kV. A compatible digital multimeter displays the polarity sign.

How do I convert the multimeter reading?

Multiply the displayed voltage by 10,000. For example, a reading of 2.500 V corresponds to 25,000 V, or 25.0 kV, at the probe.

Will it work with any digital multimeter?

Use a meter with 10 MOhm input impedance on the selected DC-voltage range. A different input impedance can change the divider ratio and measurement accuracy.

Can it measure AC or pulsed voltage?

The published rating is for DC voltage only. Frequency response, pulse behavior, and transient peak capability are not specified; do not use MeterMate for those signals without written application approval from Spruce Science.

Can I use the probe to discharge a capacitor?

The spherical electrode can support controlled discharge procedures, but suitability depends on voltage, capacitance, stored energy, repetition rate, and the required discharge time. Confirm the procedure and energy limits before use, and always verify the remaining voltage afterward.

Safety information: High voltage can cause severe injury, death, fire, and equipment damage. MeterMate is intended for trained personnel familiar with high-voltage measurement and discharge practices.

Do not exceed ±40 kV DC.
Do not use the probe for AC, RF, rapidly pulsed, transient, or unknown waveforms unless Spruce Science has confirmed the application in writing.
Connect the earth-ground lead before applying high voltage.
Keep hands behind the guard disc during measurement.
Maintain adequate air and surface clearances for the applied voltage, environment, altitude, humidity, and contamination level.
Never touch the probe shaft, electrode, circuit, or exposed conductors while the system is energized or may retain charge.
Verify the multimeter input impedance and selected function before use.
Evaluate stored energy separately. A voltage rating alone does not establish that a probe is suitable for discharging a particular capacitor or power source.
Do not use the probe if any component is damaged, wet, dirty, loose, or modified.

Add high-voltage capability to your measurement bench

MeterMate turns a compatible everyday digital multimeter into a practical tool for measuring, discharging, and verifying high-voltage DC systems—without the cost and bench space of a dedicated high-voltage meter.

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Specifications are subject to change as the product is improved. Confirm requirements for your application with Spruce Science before ordering.