Humboldt HS-5001NX Nuclear Gauge

Features of the NX Gauge


NX Gauge

Humboldt’s New HS-5001NX Moisture/Density Gauge provides more efficient operation, data collection and processing than any other gauge in its class. The HS-5001NX brings you a host of new features aimed at making your job easier. Featuring a color touchscreen, the NX Gauge provides intuitive operation of all gauge operations. It also provides touch pad operation as an alternative control method.

The New NX's versatility allows it to measure density through direct transmission, backscatter, thin lift and trench modes, as well as providing moisture determinations. The gauge uses an advanced microprocessor-based technology to provide highly accurate measurements of density and moisture that are automatically computed for direct readouts of wet density, dry density, moisture content, percent of moisture, percent of compaction (Proctor or Marshall), void ratio and air voids.

The New NX Gauge complies with all pertinent standards: ASTM D6938, D2950, C1040 and AASHTO T310, T355 and all other international standards. The gauge is calibrated by the Five-block calibration method ASTM D7013, D7759.

For immediate assistance, please call us at 1‑800‑537‑4183

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Touch-Screen or Touch Pad —

Color touch-screen, which provides complete control or you can also use the menu-driven touch pad.

Temperature Icon

Temperature Sensor —

Auto recording ambient temperature at test

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WiFi Enabled —

The NX gauge can connect to your PC for downloading test results wirelessly up to 30 feet.

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USB Port —

For fast, test download

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3D Accelerometer —

Auto turn off on motion (with movement of the gauge)

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Multi-Language —

Selectable: English, French, & Spanish

Battery Icon

Dual Power Source —

6 AA batteries & rechargeable NiMH pack

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Micro SD Card —

Auto storage of 2GB of test Data, 250 tests per project

GPS Icon


Geographic coordinates and altitude information

Clock Icon

Real Time Clock (RTC) —

Multi-date/time formats

Light Sensor Icon

Ambient Light Sensor (ALS) —

Can sense the light and automatically power on backlight.

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Easy Self Repairs —

The NX Gauge's modular design enables it to be serviced in the field by you, if necessary. No need to send the gauge in for repair, we'll send you the necessary components and walk you through the repair procedures if assistance is needed.




Operating Temperature: 14 to 158°F (-10 to 70°C) ambient, 347°F (175°C) Material Surface
Storage Temperature: -70 to 185°F (-55 to 85°C)
Humidity: 98% without condensation, Rain-Resistant Construction
Vibration: 0.1" (2.5mm) at 12.5 Hz
Shielding: Tungsten Powder Alloy
Source Rod: 440C Stainless steel, Induction, heat treated to 55 Rockwell C
Gauge Base: Computer-Machined 6061-T6 Aluminum, Hard-Coated and PTFE Impregnated
Post and Frame: Computer-Machined 6061-T6 Aluminum, Anodized for Anti-corrosion
Index Rod: 7075 aluminum, Hard Coated and PTFE Impregnated
Top Shell: Injection-Molded Noryl with Integral Color
Bearing: Relieved Bronze with Neoprene Seals
Screws/Fittings: Stainless Steel and Brass


Measurement: Density at 125 pcf (2000 kg/m3)

Direct Transmission, 6" (150mm) 15 seconds (Fast) 1 minute (Std.) 4 minutes (Slow)
Precision, pcf (kg/m3): ±0.5 (8) ±0.25 (4) ±0.13 (2)
Chemical Error, pcf (kg/m3): ±1.0 (16) ±1.0 (16) ±1.0 (16)
Surface Error, pcf (kg/m3) -0.5 (8) -0.5 (8) -0.5 (8)
Backscatter, 3.5" (88mm) 15 seconds (Fast) 1 minute (Std.) 4 minutes (Slow)
Precision, pcf (kg/m3) ±1.0 (16) ±0.5 (8) ±0.25 (4)
Chemical Error, pcf (kg/m3) ±2.5 (40) ±2.5 (40) ±2.5 (40)
Surface Error, pcf (kg/m3) -3.0 (48) -3.0 (48) -3.0 (48)
Measurement Moisture at 10pcf (160 kg/m3)
Measurement Depth:
4-8" (100-200mm)
15 seconds (Fast) 1 minute (Std.) 4 minutes (Slow)
Precision, pcf (kg/m3) ±0.5 (8) ±0.25 (4) ±0.13 (2)
Surface Error, pcf (kg/m3) -0.25 (4) -0.25 (4) -0.25 (4)



Dimensions (base): 15.75" x 8.66" x 5.5" (400 x 220 x 140mm)
Handle Height: 18" or 21.5" (450 or 550mm)
Weight: 30 lbs (13.6kg)
Reference Standard:
Dimensions: 13.8" x 7.8" x 3" (350 x 200 x 75mm)
Weight: 10 lbs (4.5kg)
Transit Case:
Dimensions: 31" x 14" x 19.5" (787 x 356 x 495mm)
Weight: 31 lbs (11.8kg)
Accessory Case (loaded):
Dimensions: 19.7" x 9.8" x 5" (500 x 250 x 125mm)
Weight: 16 lbs (7.3kg)
Total Shipping Weight: 90 lbs (41kg)


Radioactive Materials Data Needed for License Application

Material Chemical/Physical Form Maximum Amount
Cesium-137 Sealed Source Humboldt 2200064 Not to exceed 11 millicuries per source
Americium-241:Be Sealed Source Humboldt 2200067 Not to exceed 44 millicuries per source



Displays: TFT, Normal Color, Sunlight Readable
Timer Stability: 0.01%
Power Supply Stability: 0.10%
Power Source: Six (6) alkaline AA-size batteries and NiMH
Power Consumption: Active: 0.9 - 24mA, Battery Life: 1200 hours
Power Protection: Regulated Supplies - Short Circuit Proof
Low Battery Condition: LOBAT Alarm and Auto Shutoff for low and dead battery conditions
Battery Life: Remaining Battery Life Automatically Estimated at Power-up by activating TEST routine
Language: Selectable: English, French, Spanish
Microcontroller (MCU): 160MHz, 32 Bit
Real Time Clock (RTC): Multi date/time formats
3D Accelerometer: Auto turn off on motion
Micro SD Card: Auto storage of 2GB of test Data - 250 tests per project
Shutdown: Auto/User selectable



Gamma Source
Material, Type and Amount: Cs-137, 370MBq (10mCi)
Special Form Registration: USA/0356/S-96 Rev 12
ANSI and ISO Class: ANSI 77C66535
Neutron Source
Material, Type and Amount: Am-241: Be, 1.48GBq (40mCi)
Neutron Yield: 70 Knps ±10%
Special Form Registration: CZ/1009/S-96 Rev 1
ANSI and ISO Class: ANSI 77C66545
Type: Sealed Source, Special Form
Housing: Stainless Steel, Double Encapsulated
Surface Dose Rates: 18.7 mrem/hr Maximum (Neutron and Gamma)
Transit (shipping) Case: DOT 7A, Type A, Yellow II Label, 0.2 TI