Ideal for accurately measuring internal and external thread forms. Manufactured from hardened and polished steel, the blades are precision milled for optimum accuracy. Enclosed in a steel case.



Featrures and Benefits

• Hardened and polished steel for increased durability

• With precision milled blades for accuracy

• Used to internal and external thread forms

• Enclosed in a steel case for easy storage and portability

Sturdy Flukes. Reliable Flukes. Flukes are accurate.



True-rms measurements and optimized ergonomics make the 320 Series Clamp Meters the best general troubleshooting tool for commercial and residential electricians. The 323, 324 and 325 series are designed to check for the presence of load current, AC voltage and continuity of circuits, switches, fuses and contacts. These small, sturdy clamp gauges are ideally suited for current measurements up to 400 A in tight cable enclosures. The Fluke 325 also offers DC current and frequency measurements.

Modern design with a knurled thumb wheel for easy use when taking internal and external depth and step measurements.

Dual readout giving instant inch/metric conversion at the touch of a button.

Zero reset at any point, large clear display, error-free operation, fast response speed. Non-output type.



Resolution: 0.01mm/0.0005".



Extra batteries available - Order Code EDI -904-4000K.

Accurate enough for lab use, and rugged and portable enough to take anywhere
• Best-performing industrial heat sources (accuracy, stability, uniformity) in the world
• Immersion depth to 203 mm (8 in)
• Optional ITS-90 reference input reads PRTs to ±0.006 °C
• Temperature range from –45 °C to 700 °C

Every once in a while, a new product comes around that changes the rules. It happened when we introduced handheld dry-wells. It happened when we introduced Micro-Baths. Now we’ve combined bath-level performance with dry-well functionality and legitimate reference thermometry to create Metrology Wells.

With groundbreaking new proprietary electronics from Fluke Calibration's (patents pending), Metrology Wells let you bring lab-quality performance into whatever field environment you might work in. New analog and digital control techniques provide stability as good as ±0.005 °C. And with dual-zone control, axial (or “vertical") uniformity is as good as ±0.02 °C over a 60 mm (2.36 in) zone. (That’s 60 mm!) Such performance doesn’t exist anywhere else outside of fluid baths.

In short, there are six critical components of performance in an industrial heat source (which the European metrology community explains, for example, in the document EA-10/13): calibrated display accuracy, stability, axial (vertical) uniformity, radial (well-to-well) uniformity, impact from loading, and hysteresis. We added a seventh in the form of a legitimate reference thermometer input and created an entirely new product category: Metrology Wells.

(By the way, Metrology Wells are the only products on the market supported by published specifications addressing every performance category in the EA-10/13. Our specs aren’t just hopes or guidelines. They apply to every Metrology Well we sell.)