Density Gauges 3430 and 3440

Product Features

For compaction control of :
- Soil 
- Asphalt
- Aggregate


A Model for Every Project Application And Budget

Model 3440

Data Storage - Stores up to 450 test records -
downloads to printer or computer. RoadReader DMS
software is furnished with gauge for analysis and report generation via computer.

Automatic Indexing - Eliminates a major source of operator error. Automatically senses depth of measurement.

30 special Functions Provided - For example : self test and service programs, selected precision, field calibration for special materials.


Model 3430

Choices of Languages - Keypad, display, and operators manual in your choice of English, Chinese, Spanish, and French. 

Simple to Operate - Single keystroke function access. Direct readout of test results.

Best Value in the Industry - No other moisture/density gauge offers the benefits and proven performance of the Model 3430 at such an attractive price.



Features shared by both the Model 3440 and 3430
  • Light weight - 29 lbs. (13.2kg)
  • Direct readout of wet density, dry density, moisture, % moisture, % voids, %compaction
  • Powered by rechargeable nicad batteries or backup alkaline batteries
  • Prompts user through steps of operation

Training and Licensing
Training of Troxler gauge operators in regulation compliance, basic radiation safety, and field applications is provided directly from Troxler throughout the United States, Canada, Germany. It is also available worldwide through the extensive network of Troxler distributors. Certification following successful completion of Troxler training courses is widely accepted for licensing.


Both the Model 3440 and 3430 meet or exceed the following ASTM standards :
D2922                  D3017                 D2950                 C1040



 Measurement Specifications
 (U.S Customary Units)
 Direct Transmission Density ( 6" ) 15 sec 1 min 4 min
 Precision at 120pcf 0.42 0.21 0.11±pcf
 Composition error at 120 pcf 1.25 1.25 1.25±pcf
 Surface error (0.05", 100% Void) pcf 0.87 0.87 0.87-pcf
 Backscatter (98%) (4") 15 sec 1 min 4 min
 Precision at 120pcf 1.00 0.50 0.25±pcf
 Composition error at 120pcf 2.50 2.50 2.50±pcf
 Surface error (0.05", 100% Void) pcf 3.43 3.43 3.43-pcf
 Moisture at 15pcf 15 sec 1 min 4 min
 Precision at 15pcf 0.64 0.32 0.16±pcf
 Surface error (0.05", 100% Void) pcf 1.12 1.12 1.12-pcf
 Depth of measurement at 15pcf (6")      
 (S.I. Units)
 Direct Transmission - 150mm 15 sec 1 min 4 min
 Precision at 2000kg/m3 6.8 3.4 1.7±kg/m3
 Composition error at 2000kg/m3 20.0 20.0 20.0±kg/m3
 Surface error (1.25 mm, 100% Void) kg/m3 14.0 14.0 14.0-kg/m3
 Backscatter Density (98%) - 100mm 15 sec 1 min 4 min
 Precision at 2000kg/m3 16.0 8.0 4.0±kg/m3
 Composition error at 2000kg/m3 40.0 40.0 40.0±kg/m3
 Surface error (1.25mm, 100% Void) kg/m3 55.0 55.0 55.0-kg/m3
 Moisture 15 sec 1 min 4 min
 Precision at 250kg/m3 10.3 5.1 2.5±kg/m3
 Surface error (1.25mm, 100% Void) 18.0 18.0 18.0-kg/m3
 Depth of measurement at 250kg/m3 - 150mm  
 Calibration Specifications
 Accuracy of Density Standards  ±0.2%
 Accuracy of Moisture Standards  ±2.0%
 Calibration Range  70-170 pcf (1100-2700 kg/m3) Density
   0.40 pcf (0-640 kg/m3) Moisture
 Radiological Specifications
 Gamma Source  8 mCi ± 10% Cs-137
 Neutron Source  60 uCi ± 10% Cf-252 or 40 mCi ± 10% Am-241:Be
 Source Housing  Stainless Steel Encapsulation
 Shielding  Tungsten, lead and cadmium
 Surface Dose Rates  20.5 mrem/hr max., neutron and gamma
 Source Rod Material  Stainless Steel
 Shipping Case  DOT 7A, Type A
 Sealed Source Approved For
 Domestic and International Shipments
 Special Form
 Electrical Specifications
 Time Accuracy and Stability  ±0.005%, ±0.0002%/ºC
 Power Supply Stability  ±0.01%/ºC
 Stored Power  30 watt-hours
 Battery Recharge Time  14-16 hours (automatic cutoff) 
 Charger 110/200 VAC, 50-60 Hz or 12-14 VDC
 Readout  4 x 16 alpha-numeric liquid crystal display (2 x 16 on 3430)
 Gauge returns to Gauge Ready (power saving mode) after two minutes of inaction, except in standard, stat test, drift test, and in 
 nomograph programs when a 30-minute delay is provided. After 5 hours of inactivity, gauge performs complete shut-down.

 Battery packs are fully protected against overcharge and overdischarge. (Remaining battery voltage is indicated on the display).  
 (3440 only)

 Emergency Use - Capable of operation with D size alkaline batteries.

 Mechanical Specifications
 Case  High Impact Plastic; 29.5" long, 14" wide, 17" tall
 Vibration Test  0.1 in. (2.5mm) at 12.5 hz
 Drop Test  300mm on 25mm diameter steel ball
 Operating Temp : Ambient
 14º to 158ºF (-10º to 70ºC)
 350ºF (175ºC)
 Storage Temp.  -70º to 185ºF (-55º to 85ºC)
 Gauge Size (excluding handles)  14.8 x 9.1 x 7.2 in. (376 x 231 x 183 mm)
 Gauge Height (with handles)  12" : 23.25 in. (591mm)
  8" : 19.25 in. (489mm)
 Weight  29 lbs. (13.2 kg)
 Shipping Weight  90 lbs. (40.8 kgs) with transport case
 Available Models  8" or 12" index rod with 1" or 2" increments 
 (200 or 300mm index rod with 25 or 50 mm increments)
 Standard Accessories
 Reference Standard, Scraper Plate, Drill Rod, Drill Rod Extraction Tool, 12-14 VDC Charger, AC Charger, Battery Case 
 (Alkaline), Instruction Manual, Water Resistant Transport Case (Meets ASTM Specs), DMS Data Management System Software 
 with cables for 3440 (in USA and Canada only)
 Optional Accessories
 TroxAlertTM Survey Meter, TLD Radiation Monitoring Service, Leak Test Kit, Printer, Magnalube-G Lubricant, Source Rod Pig, 
 Concrete Adapter.
 Special Functions for Model 3440
 Automatic standard count comparison and storage.
 Determination of count time for selected precision.
 Field offsets of density and moisture data.
 Field calibration for special soil types.
 Nomograph method for measurement of asphalt overlays.
 Method to negate effects of sidewalls on measurement in a trench.
 Automatic depth indicator with manual override.
 Calculator mode with storage.
 Self-test and service programs :          Display, Keypad, and Ram Test He3 and G-M Tube
                                                         Test Statistical Stability and Drift Test Gauge Identification Program
 Communication Specifications
 Serial Port  RS-232 (field-selectable 300 to 4800 baud)