The FLIR CM85-2 with CM57-2 flexible clamp and the Fluke 376 FC with iFlex are professional clamp meter solutions for high-current electrical testing. Both measure up to 1000 A with their clamp jaws and extend into flexible coil ranges. The Fluke 376 FC is the all-in-one option, bundling clamp + iFlex probe in one kit, accurate to ±3% ±5 digits. The FLIR combo achieves higher amperage (3000 A vs 2500 A) with similar accuracy, but requires two separate meters.

M-Testco certifies both systems in Houston with NIST-traceable calibration.

Side-by-Side Specification Table

Feature / Capability	FLIR CM85-2 + CM57-2 (Certified in Houston by M-Testco)	Fluke 376 FC + iFlex (Certified in Houston by M-Testco)
Clamp Current	1000 A AC/DC (CM85-2 clamp)	1000 A AC/DC (376 FC clamp)
Flexible Current	3000 A AC (CM57-2 flexible coil, standalone meter)	2500 A AC (iFlex probe, plugs into 376 FC)
Flexible Accuracy	±3% of reading + 5 digits	±3% of reading ±5 digits
True RMS	Yes	Yes
VFD / Inrush Modes	Yes – VFD filtering, inrush capture, phase rotation	Yes – VFD low-pass filter, inrush capture
Connectivity / App	Bluetooth METERLiNK® for data streaming, logging, alarms	Bluetooth Fluke Connect® for remote logging, trending
Form Factor	Two standalone meters (CM85-2 + CM57-2)	One clamp meter kit with integrated iFlex probe
Safety / Ruggedness	CAT IV 600 V / CAT III 1000 V, IP54, drop tested	CAT IV 600 V / CAT III 1000 V, rugged build
Field Adoption	Less common, newer ecosystem	Long-standing, widely trusted in industrial trades

❓ Q&A Section

Q: Which system is more convenient?
A: The Fluke 376 FC with iFlex is the more streamlined choice. It’s sold as a single kit with both clamp and flexible measurement up to 2500 A, eliminating the need for multiple meters.

Q: Which offers higher maximum current capacity?
A: The FLIR CM57-2 flexible clamp reaches 3000 A AC, compared to the Fluke iFlex’s 2500 A. However, FLIR requires carrying two separate meters.

Q: How do they compare on accuracy?
A: Both systems are rated at ±3% ±5 digits for flexible coil measurements. Neither has a clear edge in precision—performance is essentially equivalent.

Q: Which is more widely used?
A: The Fluke 376 FC is a proven workhorse across electrical industries. The FLIR CM85-2 + CM57-2 combo is newer, offering higher total capacity but with less widespread adoption.

Best Choice by Application

Convenience & Industry Standard → Fluke 376 FC + iFlex (Certified in Houston by M-Testco)
Higher Amperage Capacity → FLIR CM85-2 + CM57-2 (Certified in Houston by M-Testco)

M-Testco Advantage

M-Testco ensures accurate clamp meter performance with Houston-based certification:

FLIR CM85-2 + CM57-2 → Certified in Houston with NIST traceability
Fluke 376 FC + iFlex → Certified in Houston with NIST traceability
Fast, professional turnaround for critical electrical testing tools

Call to Action

✅ Certify your FLIR CM85-2 + CM57-2 or Fluke 376 FC + iFlex with M-Testco in Houston today to ensure reliable, NIST-traceable accuracy.