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Fluke 28 II EX
Intrinsically Safe True RMS Multimeter

  • 4-1/2 digit mode for precise measurements (20,000 counts)
  • True-rms ac voltage and current for accurate measurement on nonlinear signals
  • Measures up to 1000V and 10A ac and dc (note that Ex zones require reduced measurements)
  • Low pass filter ensures accurate voltage and frequency measurements on variable speed motor drives (VSDs)
  • Frequency to 200 kHz and % duty cycle to help you diagnose VSDs and switching power supplies
  • Resistance, continuity and diode test
  • 10,000 μF capacitance range for components and motor caps
  • Conductance measurements for high resistance or leakage tests
  • Min/Max/Avg and Peak capture to record transients and variations automatically
  • Relative mode to remove test lead interference on resistance measurements
  • Auto and manual ranging for maximum flexibility
  • Input Alert protects you by chirping and flashing “Lead” when leads are plugged into the wrong inputs
  • Backlit keypad buttons provide extra visibility in poorly lit areas, even when you’re wearing full PPE
  • Large display digits and 2-level bright white backlight also increases visibility
  • Long battery life—400 hours typical without backlight (Alkaline)
  • Optional magnetic hanger for easy setup and viewing
  • For Non Intrinsic Model See: Fluke 28II
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Product Information
Datasheet 108 KB PDF
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The Fluke 28 II EX Intrinsically Safe True RMS Multimeter is an intrinsically safe digital multimeter (DMM) you can use in IIC (gas), in Zone 1 and 2 and IIIC (dust), Zone 21 and 22. Whether you work in petroleum, chemical, or pharmaceutical environments, all the test and troubleshooting power you need is packed into the most rugged intrinsically safe (IS) DMM Fluke has ever built. The Fluke 28 II Ex is also waterproof, dust-proof and drop-proof. You’ll be equipped to handle any situation, inside and outside of hazardous zones, without compromising compliance or measurement performance.

Tested for drops of up to 3 meters (10 feet), waterproof and dustproof (IEC60529, IP67), this Fluke 28 II EX Intrinsically Safe True RMS Multimeter survives the roughest treatment in the harshest environments.

Like all Fluke DMMs, the 28II Ex delivers the accuracy and measurement performance you depend upon to succeed in your work, day after day.
Fluke 27II Specifications
Function Range Accuracy
DC Voltage 0.1 mV to 1000 V ±0.5% +1
AC Voltage 0.1 mV to 1000 V ±0.7% +4
DC Current 0.1 μA to 10 A ±0.2% +4
AC Current 0.1 μA to 10 A ±1.0% +2
Resistance 0.1MΩ to 50MΩ ± (0.2 % + 1)
Conductance 60.00 nS (1.0 % + 10)
Diode Test 2.0 V ± (2.0 % + 1)
Duty Cycle 0.0 % to 99.9 % Within ± (0.2 % per kHz + 0.1 %)
 for rise times <1 µs
Display counts 6000 counts/19,999 counts in high-resolution mode
Capacitance 1 nF to 9999 μF ± (1.0 % + 2)
Frequency 0.5 Hz to 199.99 kHz ± (0.005 % + 1)
Temperature -200 °C to +1090 °C
(-328 °F to +1994 °F)
± (1.0 % + 10) °C
 [± (1.0 % + 10) °F]
Compliance CAT IV 600 V , CAT III 1000V
IP Rating IP 67
Power Three AA batteries
Battery life 400 hours
Display LCD, with backlight
Ordering Information
Model Description Buy Online Price
MFR ID: 4017176
Fluke 28 II EX Intrinsically Safe True RMS Rugged IP 67 Industrial Digital Multimeter Buy Now $1,599.99
Optional Configuration
MFR ID: 3301271
Fluke 28 II True-RMS Rugged IP 67 Industrial Digital Multimeter Buy Now Sale $449.99
(Reg. $499.99)
Optional Accessories
MFR ID: 1610159
Fluke AC285 SureGrip Large Alligator Clips, (one red, one black) Buy Now Sale $20.24
(Reg. $24.99)
MFR ID: 2097031
Fluke TLK-225 SureGrip Master Accessory Set (Red/Black) Buy Now Sale $129.59
(Reg. $159.99)
MFR ID: 2747812
Fluke 80AK-A Thermocouple Adapter (Dual Banana to K-Type mini-con.) Required for Thermocouple Probes Buy Now Sale $24.29
(Reg. $29.99)
MFR ID: 2747801
Fluke 80BK-A Type K Integrated Digital Multimeter Temperature Probe Buy Now $44.99
MFR ID: 750422
Fluke 80PK-1 Bead Probe, Type-K Thermocouple, -40 to 260°C Buy Now Sale $28.34
(Reg. $34.99)
MFR ID: 2098723
Fluke 80PK-27 SureGrip Industrial Surface Temperature Probe, Type-K Thermocouple, -127 to 600°C Buy Now Sale $296.99
(Reg. $329.99)
MFR ID: 874610
Fluke 80PK-3A Surface Probe, Type-K Thermocouple, 0 to 260°C Buy Now Sale $135.84
(Reg. $159.99)
MFR ID: 200360
Fluke 80PK-8 Pipe Clamp Temperature Probe, Type-K Thermocouple,-29 to 149 °C Buy Now Sale $150.95
(Reg. $179.99)
MFR ID: 1288229
Fluke 80PK-9 General Purpose Probe, Type-K Thermocouple, -40 to 260°C Buy Now Sale $57.39
(Reg. $69.99)
Cases and Holsters
MFR ID: 827055
Fluke C100 Universal Hard Carrying Case Buy Now Sale $52.95
(Reg. $59.99)
MFR ID: 2437514
Fluke C101 Hardsided Carrying Case with Configurable Foam Interior Buy Now Sale $54.59
(Reg. $69.99)
MFR ID: 646858
Fluke C125 Zippered Soft Carrying Case with Detachable External Pouch Buy Now Sale $34.39
(Reg. $39.99)
MFR ID: 1547919
Fluke C550 Rugged Canvas Tool Bag, 5 Pockets, Water Resistant Buy Now Sale $86.52
(Reg. $99.99)
MFR ID: 3352559
Fluke CXT80 Rugged Pelican Hard Case, for80/180 Series Buy Now Sale $161.99
(Reg. $199.99)
Test Leads
MFR ID: 3521976
Fluke TL175 TwistGuard Test Leads, 2 mm dia probe tips (Red/Black) Buy Now Sale $23.39
(Reg. $29.99)
MFR ID: 2003625
Fluke TL220 Suregrip Industrial Test Lead Set (Red/Black) Buy Now Sale $64.79
(Reg. $79.99)
MFR ID: 1274382
Fluke TL71 1000V/10A CAT II Premium Test Lead Set (Red/Black) Buy Now Sale $24.29
(Reg. $29.99)