Ohmmeters & Bond Meters
- Technology
- 50/75/93 ohms
- Partner
- Advanced Energy
This handheld bond meter series delivers precise low-resistance measurement in a compact, portable format. The instruments provide high-accuracy readings, up to 100 hours of battery life from three AA batteries, and a 3-year warranty for dependable operation in demanding environments. Typical applications include electrical bonding and continuity verification in aircraft assemblies, lightning protection systems, renewable energy infrastructure, electric vehicles, and industrial electrical systems.
A backlit digital display improves readability in low-light conditions, while the ergonomic design supports comfortable one-handed operation. Broad compatibility with 4-wire Kelvin probes allows the meters to adapt to varied test points and measurement tasks. Optional ISO 17025 calibration and a wide range of accessories further support maintenance, manufacturing, and quality assurance workflows.
The TEGAM 700 series handheld bond meters are built for users who need accurate, repeatable low-resistance measurements in the field or on the production floor. These instruments are well suited for validating electrical bonds, grounding paths, and continuity in safety-critical and performance-sensitive applications.
Across the range, users benefit from portable one-handed operation, long battery runtime, a clear backlit display, and compatibility with a broad selection of 4-wire Kelvin probes. The series includes the standard 710A, the 720A intrinsically safe model for hazardous environments, and the 730A with Bluetooth Low Energy connectivity for wireless data logging.
Range features
A high level overview of what this range offers
- High measurement accuracy: Provides precision low-resistance readings with basic accuracy of ±0.2% for critical bond and grounding tests
- Wide measurement capability: Measures from 1 µΩ to 100 Ω, supporting everything from micro-ohm checks to higher resistance verification
- Portable ergonomic design: Lightweight handheld format enables comfortable one-handed use in confined or hard-to-reach locations
- Long battery life: Runs for up to 100 hours on 3× AA batteries, reducing interruptions during field work
- Backlit digital display: Clear 4-digit screen improves readability in dim environments and helps reduce reading errors
- 4-wire Kelvin probe support: Compatible with a wide range of probes and tip styles for accurate testing across varied surfaces and geometries
- Rugged and dependable: Durable construction, USA assembly, and a 3-year warranty support long-term industrial use
- Intrinsically safe option: The 720A is designed for hazardous locations where explosion-safe operation is required
- Wireless data logging: The 730A adds Bluetooth Low Energy connectivity for streamlined measurement capture and record-keeping
Downloads
for Ohmmeters & Bond Meters
What’s in this range?
All the variants in the range and a comparison of what they offer
Specification | Value |
Accuracy | ±(0.2% reading + 0.02% range) |
Basic Accuracy | ±0.2% |
Connector Type | M12 |
Max. Resolution | 1 µΩ |
Maximum Test Current | 100 mA |
Measurement Range | 1 µΩ to 100 Ω |
Operating Temperature | –10 to 55 °C |
Reading Rate | 3 readings per second |
FAQs
for Ohmmeters & Bond Meters
A bond meter is a specialised low-resistance ohmmeter designed to measure very small resistance values with much higher accuracy than a standard multimeter. It is intended for testing electrical bonds, joints, connectors, and grounding paths where very low resistance must be verified reliably.
Unlike ordinary ohmmeters, these instruments use 4-wire Kelvin measurement to eliminate the effect of lead and contact resistance, making them suitable for micro-ohm and milliohm measurements.
These handheld bond meters offer basic accuracy of ±0.2% and support measurements from 1 µΩ to 100 Ω. This gives users confidence when testing extremely small resistance values as well as higher low-ohm ranges.
The specification also lists overall accuracy as ±(0.2% of reading + 0.02% of range), helping ensure repeatable results across the full operating range.
4-wire Kelvin probes are used to remove the influence of lead resistance and contact resistance from the measurement. One pair of leads carries the test current, while a separate pair measures voltage directly across the test point.
This method is essential for accurate low-resistance measurement, especially in the micro-ohm and milliohm range, and is one of the main reasons bond meters outperform standard ohmmeters in critical applications.
The 710A is the standard model for general-purpose high-accuracy bond testing. The 720A is the intrinsically safe version intended for hazardous environments where explosion-safe equipment is required. The 730A adds Bluetooth Low Energy connectivity and wireless data logging support for easier measurement capture and transfer.
All three models share the same core focus on precise low-resistance measurement, while the 720A and 730A are tailored for specific safety or data-logging requirements.
The instruments are powered by three AA batteries and can operate for up to 100 hours under normal use. This long runtime is particularly useful for field service, maintenance rounds, and production environments where frequent battery replacement would be inconvenient.
Because they use standard AA cells, replacements are easy to source and quick to install.
Yes, but this depends on the model. The 730A supports wireless data logging through Bluetooth Low Energy, allowing readings to be transferred to supported mobile apps or external systems for documentation and analysis.
The 710A and 720A are primarily manual instruments and do not include the same wireless logging capability.
Yes. The 720A is the intrinsically safe variant in the series. It is intended for use in potentially explosive or hazardous environments where standard electronic instruments may not be permitted.
This makes it a strong choice for petrochemical, defence, fuel handling, and similar applications that require both safety compliance and precise low-resistance measurement.
A broad range of accessories is available, including compatible 4-wire Kelvin probes, specialised tip styles, transport and protective accessories, and hands-free support options such as tilt stands and straps.
This flexibility helps users configure the instrument for different surfaces, tight spaces, painted parts, bus bars, and other demanding measurement scenarios.
Each meter is supplied with a certificate of traceability as part of standard calibration. For users who need higher documentation standards, ISO 17025 calibration is available as an option.
This makes the series suitable for both general industrial work and environments with formal quality or compliance requirements.
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