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551 Advanced Underground Locator

Cat No: 551

UPC No: 810164861962

Introducing the Tempo 551™ Advanced Underground Locator – the Professional Grade, All-in-One Location Solution.

Designed for professionals and packed with advanced features, the 551 brings you everything you want in a Locator including; dual simultaneous frequencies, Peak & Null receiver, and IntelliTrack™ digital noise rejection.

The proprietary IntelliTrack™ digital noise rejection technology offers signal clarity in noisy environments to give you an effortless locating experience that’s smarter, faster, and more accurate.

Connect to any type of wire, use our inductive clamp or transmitter antenna when a direct connection is not available. You can also choose between peak/null modes or between two simultaneous frequencies while in the field, always ensuring optimal signal performance and enabling side-by-side comparison to better detect and characterize anomalies.

And if you often locate near AC lines or change transmitter frequencies the 551 cable locator offers IntelliTrack™ digital noise rejection technology, so you can reliably trace lines near power sources. If AC interference is an issue, the 551 will give you two unique options for tracing without needing to walk back to the transmitter. Select Passive Mode to detect the source of the noise.

Whether you’re tracing electrical lines, irrigation wires, telecom cables, or metal pipes, this rugged, IP54-rated underground wire locator is built for performance. The 551 can locate and trace utilities over 20 feet deep (6 m) and over 1 mile (1.6 km) in distance. With an ergonomic, lightweight receiver and a rugged case, the 551 delivers reliability, efficiency, and ease of use at an affordable price.

Take your underground locating and safe digging to the next level—experience the 551 today!

Assembled in the USA

551 Advanced Underground Locator551 Advanced Underground Locator551 Advanced Underground Locator551 Advanced Underground Locator551 Advanced Underground Locator

Dual Simultaneous Frequencies

  • By default, the 551™ Transmitter sends out two frequencies simultaneously ensuring optimal signal performance and enabling side-by-side comparison to better detect and characterize anomalies - all while in the field.

IntelliTrack™ Noise Rejection

  • With IntelliTrack™, we added digital noise rejection in our Receiver so that you can clearly track cables carrying a signal, despite electrical interference.

Inductive Clamp

  • With the IC-5 clamp, this locator can apply a signal without needing to disconnect or de-energize the line.

Transmitter Induction

  • Place the 551 Transmitter in Inductive Mode a few feet over a line and emit a long-range, low-bleed signal.

Passive

  • Detect and trace power lines carrying live AC-current without using the Transmitter.

Peak/Null

  • Now you don’t have to choose, you have both in the same locator. Track the line with Peak and pinpoint with Null in any frequency.

IP54

  • Protected with IP54-rated resistance to water and dust means the 551 can withstand conditions on any job site.

Bright LCD

  • High contrast sunlight readable LCD display makes the screens easy to read in any lighting conditions.
CAT NOITEM NOUPCDescriptionIMAGE
551
55505844
810164861962
551 Advanced Underground Locator
551-EU
55505892
810164862006
551 Advanced Underground Locator w/CE (Europe Model)
551EU-T
55505893
810164862013
TRANSMITTER, 551EU (Europe Model)
551-R
55505845
810164861979
RECEIVER, 551
551-T
55505846
810164861986
TRANSMITTER, 551
IC-5
55505955
810164862129
INDUCTIVE CLAMP, 551
551-C
55505949
810164862105
CASE, 551
HS-1
50086952
783310086956
OPTIONAL HEADSET
Attribute Name Attribute Value
[ - Full Unit - ] -
[ OPERATING CONDITIONS ] -
Operating Temperature 14 °F to 131 °F (-10 °C to 55 °C)
-
[ WEIGHT ] -
With Batteries 11.5 lbs
Without Batteries 9.6 lbs
-
[ - CASE DIMENSIONS - ] -
Length 28 in. (711mm)
Width 12.6 in. (321mm)
Height 4.1 in. (104mm)
-
[ - TRANSMITTER - ] -
[ PHYSICAL SPECIFCATIONS ] -
Weight without batteries 2.6 lbs
Weight with batteries 4.3 lbs
Ingress Protection Rating IP54
-
[ BATTERY SPECIFICATIONS ] -
Battery Type 6x D cell (Alkaline Recommended)
Dual Frequency Mode 40 hrs typical
Single Frequency Mode 50 hrs typical
Auto Shutoff 3 hrs
-
[ OPERATING FREQUENCIES ] -
Direct Connect 1.75 kHz + 33 kHz Simultaneous
Inductive Coupler 33 kHz
Inductive Antenna 133 kHz
-
[ MAX OUTPUT POWER ] -
Direct Connect 3.7W rms (1.8 rms for EU model)
Induction Mode <1W
-
[ - RECEIVER - ] -
[ PHSYICAL SPECIFICATIONS ] -
Weight without batteries 1.0 lbs
Weight with batteries 1.2 lbs
Ingress Protection Rating IP54
Headset sound pressure level 96±3 dBA SPL max (When used with Tempo HS-1)
-
[ BATTERY SPECIFICATIONS ] -
Battery Type 4x AA cell
Typical Battery Life 35 hrs
Auto Shutoff 1.5 hrs
-
[ OPERATING FREQUENCIES ] -
Passive Mode 50/60 Hz
Active 1.75 kHz, 33 kHz, 133 kHz