The Dakota BT2 Ultrasonic Bolt Tension Monitor is the latest gauge addition to our bolting products. It incorporates all of the great features of the Dakota BT1-DL Bolt Tension Monitor, with some added benefits in terms of features, hardware, speed, and length.

Dakota BT2-DL Ultrasonic Bolt Tension Monitor very accurately measures fasteners up to 100 feet in length, and sports our very best effort to date…in terms of overall performance/power!

Model	BT2-DL
Display Mode
Material thickness digits display	■
A-Scan	Rectified +/- (half wave view), or RF (full waveform view)
Measurement Range	PE – 25.4 – 25,400mm, EE, EEV
Resolution	+/- 0.0001mm
Measurement Rate
Manual	8 readings per second
Velocity Calibration Range	1250 – 13,995m/s
Temperature Compensation	■
Limit Alarm Mode	■
Memory and Data Logging	4GB internal memory Sequential and grid batching Bitmap graphic capture and capture viewer
Calibration Options	Automatic, fixed, single and two-point
Transducer Probe Type	Single element
Transducer Frequency Range	1 – 10MHz
Display	Blanview sunlight readable QVGA TFT color display (320 x 240 pixels) Viewable area 115.2 x 86.4 mm, or  144.78 mm diagonal
Units (Selectable)	mm, μs
LED Backlight	On / Off/ Auto
Repeatability / Stability Indicator	■
Low Battery Indicator	■
Battery Save Mode	Auto
Transducer Connector Type	Microdot, Lemo and BNC
USB-C Interface	■
Temperature Sensor	■
Screen Refresh Rate	60Hz
Timing	Precision TCXO timing with single shot 100 MHz 8 bit ultra-low power digitizer
Pulser Type	Spike, Square Wave & Tone Burst.Pulser Voltage: 100 – 400v Selectable step options Spike, Thin, Wide, HV Spike, HV Thin, HV Wide, TB .5MHz, TB 1MHz, TB 2MHz, TB 5MHz, TB 10 MHz. Spike 40 ns, Square Wave 80 to 400 ns, Tone Burst 50 ns to 1 microsecond
Damping	50, 75, 100, 300, 600, & 1500ohms
Frequency Band	Broadband 1.8 – 19 MHz (-3dB) filter
Horizontal Linearity	+/- 0.4% FSW
Vertical Linearity	+/- 1% FSH
Amplifier Linearity	+/- 1 dB
Amplitude Measurement	0 to 100% FSH, with 1% resolution
Delay	25,400 mm at steel velocity
Measurement Gate	Three independent gates depending on measurement mode selected, with audible and visual alarms. Amplitude 5-95%, 1% steps
Setups	64 custom user defined setups; factory setups can also be edited by the user
Auto Set	Automates the detection, scope, and display setting process for each individual bolt
Alarm Limits	Adjustable Hi/Low tolerances with visual LED’s and audible beeper
Field Calibration	Vector or Regression correction curve for increased accuracy using Load & Stress
Alarm Limits Bar	Hi & Lo alarm limits for displaying an acceptable tolerance range
Detections	Zero Crossing
Time	Nanoseconds
Elongation	Change in length (mm)
Load	Force load applied (pounds KIP, or megapascals MPa)
Stress	Force for unit area stress applied (millimeters per millimeter)
%Strain	Ratio of elongation to effective length
Bolt Materials	Select types from a preset or custom list
Glue-On	Available for short bolts with minimal/short elongations to eliminate transducer placement errors

Part Number	Description	Certificate
Z-197-0001	Dakota BT2-DL Benchtop Bolt Tension Monitor (Max II)	■
Operating Temperature	-10 to 60ºC
Power Supply	Lithium Ion Pack (supplied) or 6 x AA batteries
Battery Life	Lithium Pack: 18hrs, Alkaline: 12 hrs, Nicad: 5 hrs, NI-MH: 12 hrs
Gauge Weight	2.04kg – including batteries
Gauge Dimensions	216 x 165 x 70mm

● Certificate supplied as standard

Dakota BT Benchtop Bolt Tension Monitor – Data Sheet

Factory calibration traceable to NIST & MIL-STD-45662A

Packing List	Z-197-0001
Unit	■
Lithium Pack	■
Couplant	■
USB Type A to Type B Transfer Cable	■
Carrying Case	■
Lemo 00 to Microdot Transducer Cable	■
PC Utility Software (free from website)	■
Operation Manual	■
Certification	■

Dakota BT2-DL Benchtop Bolt Tension Monitor (Max II)
	Part Number:	Z-197-0001