GE DM4E Ultrasonic Thickness Gauge

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The DM4E is a small, simple-to-use general purpose thickness
gauge with excellent ultrasonic performance. It is ideal
for the user who demands a simple, compact, reliable
instrument at an affordable price. The DM4E comes with
the quality, dependability, and durability that you expect
from a Krautkramer D-Meter.

• Fits Comfortably in the Palm; Weighs only 9 oz.(255g)
• 200 hrs. on 2 AA Alkaline Batteries
• Sealed, Gasketed, Splash-Proof Housing
• 4 Key Operation
• MIN Mode Captures Thinnest Reading
• Velocity Readout and Calibration
• Stable High Temp. Reading (up to 1,000/°F, 538/°C) with HT 400 Probe
• High Contrast Backlit Display for Easy Viewing Under Any Circumstances

Base Instrument Package:
DM4E Ultrasonic Thickness Gauge
Two 1.5V AA Alkaline Batteries
Carrying Case
Operating Manual
Certificate of Conformity

Accessories:
RC-984- Rubber instrument case with prop-up stand, adjustable neck and wrist straps,
and hanging loop
FB-579- Field Accessory Belt with removable pouches
LCC-326- Locking Transport and Storage Case
HTC-010- HiTempco Couplant (2 oz. tube)
Operating Principle
Ultrasonic pulse/echo
Probe Zero Adjustment
Automatic, or manual 2-pt. calibration
V-Path Correction
Automatic, microprocessor controlled
Measuring Range
.025" to 20.00" (.6 to 500 mm.) depending on probe, materials, surface conditions, and temperature
Resolution
.001" or 0.01" up to 9.999" ; 0.01 above 9.999"
(.01 or .1 mm up to 99.99mm, .1 above 99.99mm)
Update Rate
4 Hz;.25 Hz in Minimum Capture Mode
Gain
Automatic (Hi, Med., Lo)
Velocity Range
39,000 to 393,700 in/sec.
1000 to 9999 m/sec.
Receiver Bandwidth
1 MHz to 10 MHz (-3dB)
Display Type
4 digit LCD, .5" (12.7 mm) high with electroluminescent backlight
Power Supply
2 ea. 1.5 V, AA alkaline cells
Hi/Lo gain indicator (manual mode)
Operating Time
Up to 200 hrs. @ 25% duty cycle without backlight
Auto Shut-Off
After 3 min. of non-use
Temperature Range
+10 degrees F to +120 degrees F
(-10 degrees C to +50 degrees C)
Dimensions (L x W x D)
5.8" x 3.0" x 1.4"
(146.0 mm x 76.2 mm x 34.2 mm)
Weight
9 oz. (255 g) including batteries
Hazardous Area Operation
Safe operation as defined by MIL-STD-810E, Method 511.3, Procedure I.

Model	Designations	Cable Type	Contact Diameter	Range	Temp
FH2E	High Sensitivity Fingertip	Potted	.380"  .96 mm	.030 - 2.0"  .75 - 50 mm	< 130° F  < 54° C
KBA560	General Purpose	KBA531	.625" 15.9 mm	.060 - 8.0" 1.5 - 200 mm	< 450° F < 232° C
HT400	High Temperature	KBA535 / 536	.500" 12.7 mm	.040 - 10.0" 1 - 254 mm	< 1000° F < 538° C
DA312	Thin Materials	KBA532	. 300"   7.6 mm	.025 - 1.0" .64 - 25 mm	< 130° F < 54° C
DM-401-GP*	General Purpose	KBA533 / 533A	.700" 17.8 mm	.060 - 8.0" 1.5 - 200 mm	< 130° F < 54° C
DM-411-GP*	General Purpose	DA233	700" 17.8 mm	.060 - 8.0" 1.5 - 200 mm	< 130° F < 54° C
DP-104	High Penetration	KBA532	1.25" 31.8 mm	.200" min. 5 mm min.	< 130° F < 54° C
DA303	Penetration	KBA533	.635" 16.2 mm	.200"min 5 mm min.	< 140° F < 60° C
DA301	General Purpose	KBA533	.475" 12.1 mm	.050 - 8.0" 1.2 - 200 mm	< 140° F < 60° C
FH2E-WR	Wear Resistant	Potted	.550" 14.0 mm	.030 - 2.0" .75 - 50 mm	< 130° F < 54° C
KBA560-WR	Wear Resistant	KBA531	.700" 17.8 mm	.060 - 8.0" 1.5 - 200 mm	< 450° F < 232° C
FH2E-D*	High Sensitivity Fingertip	Potted	.380"   9.6 mm	.030 - 2.0" .75 - 50 mm	< 130° F < 54° C
KBA560-D*	General Purpose	KBA531	.625" 15.9 mm	.060 - 8.0" 1.5 - 200 mm	< 250° F < 121° C
DA312B16	3 mm Footprint	Potted	.120"   3.0 mm	.025 - .500" .6 - 13 mm	< 130° F < 54° C
KBA525	5 mm Footprint	Potted	.200"      5 mm	.025 - 1.0" .6 - 25 mm	< 130° F < 54° C

Specifications: