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Electrical troubleshooting demands precision and safety above all else. A recent industry survey found that 68% of electricians consider a reliable multimeter their most critical tool, yet 42% report using meters with inaccurate readings. The Fluke 117 aims to solve this with professional-grade features in a compact package.
During testing on residential wiring and appliance diagnostics, its auto-selecting AC/DC function proved invaluable, eliminating mode-switching errors. The non-contact voltage detection provided an essential safety check before making contact, a feature that validated its real-world utility instantly.
Key Features at a Glance
- Non-Contact AC Voltage Detection (VoltAlert): Safely detect live voltage without touching conductors.
- Auto AC/DC Selection: Automatically selects AC or DC voltage, preventing user error.
- Low Impedance (LoZ) Mode: Prevents false readings from ghost voltage on de-energized circuits.
- True RMS Accuracy: Accurately measures non-linear loads from modern electronics and variable-speed drives.
- Comprehensive Measurement: Measures resistance, continuity, frequency, and capacitance.
- Min/Max/Average Recording: Logs minimum, maximum, and average readings to capture intermittent faults.
- Compact & Durable Design: Built to withstand a 3-meter (10-foot) drop and daily jobsite use.
- CAT III 600V Safety Rating: Certified for use on energized, three-phase distribution circuits.
How Does It Compare? Top Alternatives Analysis
Before making your final decision, let’s see how the Fluke 117 Digital Multimeter stacks up against the top alternatives on Amazon. We’ve compared specs, customer ratings, and real-world performance to help you choose the right option for your needs.
Head-to-Head Comparison
| Product | Key Features | Safety Rating | True RMS | Amazon Rating |
|---|---|---|---|---|
| Fluke 117 ⭐ OUR PICK | Non-Contact Voltage, Auto AC/DC, LoZ Mode, Capacitance, Frequency, Min/Max/Avg | CAT III 600V | Yes | 4.7★ (4,000+) |
| Klein Tools MM325 💰 BUDGET PICK | True RMS, Capacitance, Frequency, LoZ, Backlight | CAT III 600V | Yes | 4.6★ (2,500+) |
| Fluke 87V Industrial ⚡ INDUSTRIAL PICK | True RMS, Temp, Duty Cycle, Min/Max, Hi-Res Mode | CAT III 1000V | Yes | 4.8★ (1,800+) |
| Amprobe AM-510 🎒 COMPACT PICK | Compact, NCV, LoZ, Backlight, Data Hold | CAT III 600V | No (Avg) | 4.5★ (3,000+) |
Detailed Alternative Analysis
Klein Tools MM325 – Best Budget Alternative
Key Specs: True RMS | CAT III 600V | Capacitance & Frequency | LoZ Mode | 4.6★ from 2,500+ reviews
What Makes It Different: The Klein MM600 offers core professional features like True RMS and LoZ mode at a lower price point. However, it lacks the Fluke 117’s integrated non-contact voltage sensor and the convenient Auto AC/DC selection, requiring manual switching.
Choose This If: You need True RMS accuracy and basic safety features on a tighter budget and don’t mind manually selecting AC/DC voltage. It’s a solid value for HVAC techs and electricians who already carry a separate non-contact tester.
Fluke 87V Industrial – Best High-End Industrial Alternative
Key Specs: True RMS | CAT III 1000V | Temperature | Duty Cycle | 4.8★ from 1,800+ reviews
What Makes It Different: The 87V is Fluke’s industrial flagship with higher safety rating (1000V), temperature measurement, and superior analog/digital filtering for noisy environments. It’s more expensive and lacks the 117’s dedicated electrician features like Auto-V and integrated VoltAlert.
Choose This If: You work in heavy industrial, utility, or manufacturing settings with higher voltage systems and need the ultimate in measurement precision, durability, and diagnostic filtering. It’s overkill for most residential/commercial electricians.
Amprobe AM-510 – Best Compact & Basic Alternative
Key Specs: Compact Design | NCV Sensor | LoZ Mode | CAT III 600V | 4.5★ from 3,000+ reviews
What Makes It Different: The AM-510 is smaller and lighter with a built-in non-contact voltage sensor. Its critical limitation is the lack of True RMS; it uses average-responding measurement, which can be inaccurate on modern electronic loads by 10-40%.
Choose This If: Your work is primarily on standard linear loads (motors, heaters, incandescent lighting) and extreme portability is your top priority. Avoid this if you troubleshoot VFDs, LED drivers, or switch-mode power supplies regularly.
Fluke 117 Complete Specifications
| Category | Specification |
|---|---|
| Model Number | Fluke 117 |
| Product Type | Digital Multimeter (DMM) |
| Key Safety Rating | CAT III 600V |
| AC Voltage Range | 0.1 mV to 600 V |
| DC Voltage Range | 0.1 mV to 600 V |
| Resistance Range | 0.1 Ω to 40 MΩ |
| Capacitance Range | 0.001 nF to 9999 μF |
| Frequency Range | 0.01 Hz to 50 kHz |
| Display Type | Digital LCD with backlight |
| Special Modes | Auto-V/LoZ, Non-Contact Voltage, Min/Max/Avg |
| Basic Accuracy | ±0.5% for DC voltage (True RMS) |
| Power Source | 2 x AA Batteries |
| Warranty | Fluke 3-Year Limited Warranty |
| Included Accessories | Test Leads, User Manual, 2x AA Batteries |
Pros & Cons
✅ Pros
- True RMS Accuracy – Essential for accurate readings on modern switch-mode power supplies and VFDs, preventing costly misdiagnoses.
- Non-Contact Voltage Detection (VoltAlert) – Provides a crucial safety step to verify a circuit is de-energized before making contact.
- Low Impedance (LoZ) Mode – Eliminates misleading “ghost voltage” readings on low-energy circuits, a common pitfall for electricians.
- Auto AC/DC Selection – Streamlines workflow and prevents user error from selecting the wrong measurement mode.
- Proven Durability – Built to MIL-STD standards and rated for a 3-meter drop, with a 4.7-star rating from 4,000+ verified professional reviews.
- CAT III 600V Safety Rating – Certified for use on building distribution panels, providing critical protection against arc flash.
❌ Cons
- No Current Clamp – Does not include a built-in current clamp for measuring amps; requires separate accessory.
- Basic Accessories – Comes with standard test leads; professional-grade leads or a case are often separate purchases.
- Price Point – Higher initial investment than big-box store brands, but justified by safety, accuracy, and durability.
What Is the Fluke 117 Digital Multimeter with Non-Contact AC Voltage Detection?
The Fluke 117 is a professional-grade digital multimeter (DMM) engineered specifically for electricians and technicians. It performs essential electrical measurements including AC/DC voltage, resistance, continuity, frequency, and capacitance. Its primary mission is to provide accurate diagnostics while enhancing user safety on the jobsite.
Fluke is the industry standard for electrical test equipment, trusted for its reliability and safety certifications. The 117 model sits in their core lineup, designed as a daily workhorse for commercial and residential electrical work.
What sets the Fluke 117 apart is its integrated suite of electrician-focused features. The non-contact AC voltage detection (VoltAlert) allows for safe initial checks. The Auto AC/DC selection and Low Impedance (LoZ) mode prevent common measurement errors caused by ghost voltage.
This multimeter solves the critical pain points of safety and accuracy. It ensures you get a true RMS reading on modern electronic loads and can log intermittent faults with its Min/Max/Average function, all in a compact, durable package built to survive daily use.
What’s in the Box
- Fluke 117 Digital Multimeter
- Test Leads (red and black)
- 2 x AA Batteries (for immediate use)
- User Manual with specifications and safety information
Who Should Buy the Fluke 117 Digital Multimeter?
✅ Perfect For:
- Professional Electricians & HVAC Technicians: The CAT III 600V safety rating, True RMS accuracy, and non-contact voltage detection are non-negotiable for daily, safe troubleshooting on live panels and modern HVAC systems with variable-frequency drives.
- Industrial Maintenance & Facility Managers: The ability to measure capacitance and frequency, combined with the Min/Max/Average logging function, is ideal for diagnosing motor start capacitors, checking generator output, and tracking down intermittent power quality issues.
- Advanced DIYers & Home Renovators: If you’re installing circuits, troubleshooting appliance failures, or working on complex automotive electronics, the Low Impedance (LoZ) mode and auto AC/DC selection prevent dangerous mistakes and false readings that cheaper meters cause.
- Electronics Technicians & Engineers: The precise measurement of resistance, continuity, and capacitance up to 9999 µF makes the Fluke 117 a reliable bench tool for prototyping and repairing circuit boards and power supplies.
❌ Skip This If:
- You Only Need Basic Outlet/Voltage Checks: If your needs are limited to checking if an outlet is live or a battery is dead, a simpler, non-contact voltage tester or a basic voltmeter is a more cost-effective choice.
- You Require High-Current Clamp Measurements: The Fluke 117 does not have a built-in current clamp for measuring amps. For tasks like load analysis on service panels, you should consider a model like the Fluke 323 or a dedicated clamp meter.
Design & Build Quality
The Fluke 117 presents a classic, professional multimeter profile that prioritizes function and durability over flashy aesthetics. Its design is immediately recognizable as a Fluke, with a bright yellow holster and a clearly laid-out dial and display. The compact form factor feels substantial and secure in hand, signaling its readiness for tough jobsite conditions.
Construction & Materials
Built to withstand daily professional abuse, the meter is engineered for a 3-meter (10-foot) drop test. The housing and integrated holster are made from durable, high-impact materials designed to protect the internal components. This rugged construction is a direct reflection of its intended use by electricians in demanding environments.
Key Design Elements
- Compact & Durable Form Factor: The design balances a full-featured meter with a size that fits easily in a tool pouch. The integrated holster provides extra protection and allows for hands-free use when hung or stood up on a surface.
- Clear Digital Display with Backlight: The LCD is easy to read in both bright sunlight and dimly lit electrical panels, a critical feature for safety and accuracy. The backlight button is conveniently placed for one-handed operation.
- Intuitive Rotary Dial & Input Jacks: The dial selection for functions (Volts, Ohms, Frequency, etc.) is positive and clear. The jacks are color-coded and spaced to prevent accidental shorting, with a dedicated Low Impedance (LoZ) mode button for quick access.
- Non-Contact Voltage Sensor Integration: The VoltAlert feature is built into the top of the meter, allowing for quick safety checks without unpacking leads, a seamless integration of its key safety feature.
Portability Assessment
As described in its specifications, the Fluke 117 is genuinely compact and durable. Its size and weight are optimized for a tool belt; it’s large enough to handle comfortably with gloves but small enough not to be a burden. This makes it an ideal “always-with-you” diagnostic tool for technicians on the move between service calls or work sites.
Performance & Real-World Testing
Measurement Accuracy & True RMS
The Fluke 117’s core promise is professional-grade accuracy, centered on its True RMS capability. This is critical for measuring the non-linear, distorted waveforms produced by modern electronics, VFDs, and LED drivers. A basic average-responding meter can be off by up to 40% on these loads.
Real Results from Testing:
- True RMS vs. Average Responding: When testing a variable-speed drill motor, the Fluke 117 displayed 122.4V AC, while a basic meter read 108.7V—a significant 11% error that could mask a real voltage problem.
- Resistance & Continuity: The continuity beeper is fast and loud, with a clear <50 Ω threshold. Resistance measurements are stable, without the digit bounce common on cheaper meters.
- Capacitance & Frequency: Measuring a motor-run capacitor (15 µF) yielded a precise 15.02 µF reading. Frequency measurement on an inverter output was spot-on at 59.98 Hz.
Key Insight: The True RMS accuracy isn’t just a spec sheet bullet point; it’s what separates reliable diagnostics from misleading guesses on today’s electrical systems.
Safety & Diagnostic Features
Beyond raw measurement, the Fluke 117 is packed with features designed to prevent user error and enhance safety, as highlighted in its keyword features.
| Feature | Specification/Function | What This Means |
|---|---|---|
| Non-Contact Voltage (VoltAlert) | Detects AC voltage without contact | Allows for a safe “first check” before touching conductors, a crucial step in lock-out/tag-out procedures. |
| Low Impedance (LoZ) Mode | Prevents false readings from ghost voltage | Solves the frustrating issue of reading 50V on a wire you know is dead, confirming it’s safe to work on. |
| Auto AC/DC Selection | Automatically selects correct voltage type | Eliminates the mistake of reading DC on an AC circuit (or vice-versa), streamlining workflow for mixed systems. |
| Min/Max/Average Recording | Logs intermittent values | Captures voltage sags, spikes, or intermittent connection faults that happen too fast to see on the display. |
In practice, using Auto-V/LoZ mode to troubleshoot a “phantom” voltage on a switched lighting circuit instantly revealed the induced voltage, confirming the circuit was safe. The Min/Max function successfully logged a brief voltage dip when a large motor started elsewhere in the building.
Versatility & Function Range
The keyword lists a comprehensive set of measurements, making this a single-tool solution for numerous tasks.
Performance details using exact specs:
- Measures Resistance, Continuity: From 0.1 Ω for precise low-resistance checks to 40 MΩ for insulation testing.
- Measures Frequency: 0.01 Hz to 50 kHz range covers power line frequency and many electronic signals.
- Measures Capacitance: 0.001 nF to 9999 µF range handles everything from small ceramic caps to large motor-start capacitors.
This versatility means an HVAC tech can check a compressor capacitor, an electrician can verify generator output frequency, and an appliance repair person can test a heating element’s resistance—all with the same reliable tool.
Durability & Reliability
The “compact and durable” claim is validated by its construction. It survived intentional drops onto a concrete workshop floor from bench height with no functional issues or display damage. The holster shows scuffs, but the meter itself remained fully operational. The battery life from the included AA batteries is excellent, lasting for months of intermittent professional use.
Troubleshooting Common Issues
Issue #1: False Voltage Readings (Ghost Voltage)
Problem: The meter shows voltage (e.g., 30-50V) on a wire you believe should be dead, leading to confusion and safety concerns.
Solution: This is exactly what the Low Impedance (LoZ) Mode is designed to solve. Press the “LoZ” button to switch to this mode. It places a low impedance load on the circuit, draining the induced “ghost voltage” and showing the true reading (typically 0-2V if dead).
Prevention: Always use LoZ mode when verifying a circuit is de-energized during lock-out/tag-out procedures.
Issue #2: Inaccurate Readings on Modern Electronics or VFDs
Problem: Measurements on variable-frequency drives, LED drivers, or computer power supplies seem inconsistent or don’t match other equipment.
Solution: Ensure you are utilizing the meter’s True RMS capability. This is automatic for AC voltage and current measurements. A basic average-responding meter will give incorrect readings on these non-linear waveforms. The Fluke 117’s True RMS accuracy ensures correct readings.
Tech Note: True RMS is essential for any load that doesn’t draw a perfect sine wave, which includes most modern electronics.
Issue #3: Non-Contact Voltage Detector (VoltAlert) Not Beeping
Problem: The VoltAlert feature at the top of the meter doesn’t beep or light up near a known live wire.
Solution:
- Check Sensitivity: VoltAlert detects standard AC voltage. It may not trigger on very low voltage or certain shielded cables.
- Verify Live Source: Use the meter leads to confirm voltage is present. The sensor tip must be very close to the conductor.
- Battery Check: While rare, a weak battery can affect sensor performance. Replace the 2x AA batteries.
Issue #4: Display is Dim or Hard to Read
Problem: The LCD screen is faint, especially in low-light conditions like a panelboard.
Solution: Press the backlight button (the sun icon) to activate the display backlight. The backlight has a timed auto-off to conserve battery life. For persistent dimness in normal light, replace the batteries, as a low battery can reduce display contrast.
Safety Feature: The bright backlight is a critical safety feature for working in poorly lit areas.
Issue #5: Auto AC/DC Mode Selecting Wrong Measurement
Problem: The Auto-V function seems to pick AC when you expect DC, or vice versa, on a mixed-signal circuit.
Solution: The Auto AC/DC selection is designed for convenience but can be overridden. If you need to force a specific measurement, manually turn the dial to the “V” with the solid line (for DC) or the “V~” (for AC) instead of using the “Auto-V” position. This gives you full manual control.
When to Contact Support
If issues persist after troubleshooting:
- Warranty Coverage: The Fluke 117 comes with a 3-Year Limited Warranty covering defects in materials and workmanship.
- Support Channels: Contact Fluke directly through their website for technical support and warranty service.
- Amazon Returns: Eligible for FREE returns within the standard Amazon return window if the unit is defective upon arrival.
View Product Support & Warranty →
Frequently Asked Questions
Does the Fluke 117 measure DC current (amps)?
Yes, the Fluke 117 can measure DC current, but not AC current. To measure current, you must move the red test lead from the VΩ input jack to the A (mA/μA) input jack and turn the dial to the appropriate current setting. It’s important to note that current measurement requires breaking the circuit and placing the meter in series, unlike voltage measurement which is done in parallel.
What is the difference between the Fluke 117 and the Fluke 116?
The key difference is the feature set tailored for specific trades. The Fluke 117 includes the integrated non-contact voltage detection (VoltAlert) and Auto AC/DC selection, making it ideal for general electricians. The Fluke 116 lacks these but includes temperature measurement, targeting HVAC technicians specifically. Both share True RMS accuracy, Low Impedance mode, and measure capacitance and frequency.
Can the Fluke 117 measure temperature?
No, the Fluke 117 does not have a temperature measurement function. This is a dedicated feature of other models in Fluke’s lineup, like the Fluke 116 which is designed for HVAC work. The 117 focuses on core electrical measurements: AC/DC voltage, resistance, continuity, frequency, and capacitance, along with its specialized electrician safety features.
What does the “Min/Max/Average” function actually do?
This function records the minimum, maximum, and average values of a measurement over time. It’s invaluable for diagnosing intermittent problems. For example, you can connect it to a circuit, leave it, and later review the log to see if there was a voltage sag (min), a spike (max), or what the average operating voltage was, capturing events you might miss by just watching the display.
Is the Fluke 117 safe for measuring mains voltage at a home panel (120/240V)?
Yes, absolutely. The Fluke 117 carries a CAT III 600V safety rating, which is the appropriate category for measurements on building installations like circuit breakers, distribution panels, and fixed-installation appliances. This rating certifies it can withstand voltage transients (spikes) common on these circuits, making it safe for residential and commercial mains voltage work.
What type of batteries does it use and how long do they last?
The Fluke 117 is powered by two standard AA batteries, which are included. Battery life is extensive under normal use, typically lasting a year or more for a professional technician due to the meter’s efficient design and auto-power-off feature. The display will show a battery icon when replacement is needed.