SR-24 FAQs

What is the SeekTech SR-24 and what can it do?

The SR-24 is a precision utility locating instrument with GPS and Bluetooth® technology for easy integration with external data capture devices.


The SR-24’s omnidirectional antennas capture the complete signal field, making it easy to acquire the signal and trace its path. The receiver displays the utility’s position and direction on the display, providing an intuitive locating experience. For added confidence, audio and visual warnings notify the operator if the shape of the signal field is being distorted so that appropriate action can be taken to avoid mismarking the utility’s position.


SeekTech SR-24 Operator’s Manual


What are the specifications on the SeekTech SR-24?
SeekTech SR24 Specifications
Length 285 mm [11.2 in]
Width 109 mm [4.3 in]
Height 790 mm [31.1 in]
Weight without batteries 1.5 kg [3.3 lb]
Power rating 6 V, 375 mA
Battery type Four size C, 1.5 V alkaline (ANSI/NEDA 14 A, IEC LR14), or 1.2 V NiMH or Ni-Cad rechargeable batteries
Power consumption 2.25 W
LCD screen
Resolution Monochrome 240 × 160 pixels
Display size 45 mm × 65 mm

[1.8 in × 2.6 in]

Contrast ratio 700:1
Brightness 500 Cd/m2
Operating temperature -20°C to 50°C

[-4°F to 122°F]

Storage temperature -20°C to 60°C

[-4°F to 140°F]

Relative humidity 5% to 95%


Cable Mini-B, 1.8 m [6 ft]
Type 2.0
Type Class 1
Profile RFCOMM
Transmit power 19 dBm
Receiver sensitivity -92 dBm
Operating range Up to 1,000 m [3,281 ft]
Processor 48-channel SiRFstarIV GSD4e
Accuracy < 2.5 m [8.2 ft]**
Tracking -163 dBm
Autonomous acquisition -147 dBm
SD Card Micro 16 GB
**According to the documentation supplied by the man­ufacturer of the internal SiRFstarIV GPS module, its nominal accuracy is “< 2.5 m (65 percent, 24 hour stat­ic, -130 dBm)”.


Standard Equipment

• Operator’s manual

• Instructional DVD

• Four size C alkaline batteries

• Marker chips

• Mini-B USB cable


How do I update the software on my SR-24?

Make sure your SR-24 is turned off.


Find the included USB cable and make sure HQ Software is installed on your computer. To learn about HQ and download a free copy, please visit the HQ support page HERE.

Connect the USB cable to the computer and to the under side of the SR-24. You will have to open the rubber cover first.


Open HQ and click “Updates” from the Toolbar on the top left, and then click “Update Software For Your Device”.

HQ sr24 update 1


Select the SR-24 from the list of devices under “SeekTech Locating Receiver”. Follow the on-screen instructions and click next in HQ to begin updating.


In HQ it will show when the update software is copied to the device, click next in HQ to continue.


Disconnect the USB cable from the SR-24 and computer.


Turn the SR-24 on.  The device will now install the update.  This can take 5-10 minutes.


Once the update is complete the SR-24 will automatically reboot and power on. If the software included a Bluetooth update, you may see screens as seen below after it powers on.

If you do see the Bluetooth update screen on the SR-24, wait for the update to complete and then you may have to press the select key to get to the main SR-24 home screen. Your update is  complete.

To verify the update was successful, you can power off your device again, connect it to the computer, and click next until HQ shows the SR-24 was updated, as shown below. If the update was not successful or you see any errors, please try again.


*Note: Some screens and graphics in HQ and the SR-24 may appear differently than shown in this FAQ.


How do I get started with my SeekTech SR-24?

The SR‑24 functions by measuring an electromagnetic signal and estimating the position of its source. The SR‑24 can locate the signal transmitted by a RIDGID SeekTech transmitter or Sonde, other manufacturer’s transmitters, or passive signals from surrounding metallic conductors.


  1. Insert four fully charged, size C, alkaline batteries into the battery compartment and turn the knob clockwise to close.
  2. Unfold the antenna mast and lock it into place.
  3. Power on by pressing the Power Key.
  4. Set the receiver and the transmitter to the same frequency.
  5. Begin tracing the line at a logical starting place such as the transmitter hook up point.

Note: Refer to the Active Line Tracing, Passive Line Tracing, and Sonde Locating sections that follow for information on how to locate buried utilities with the SR‑24.

What are the different receiver operation modes on my SeekTech SR-24?

Line Trace Mode

In Line Trace Mode you can Active Line Trace by intentionally applying a signal onto the target line through metal-to-metal conduction or non metal-to-metal induction with a transmitter.


Also in Line Trace Mode, you can Passive Line Trace by detecting signal energy coupled onto metallic conductors from nearby energy sources such as power lines.

SR24 active line tracing

SR24 active line tracing induction

SR24 active line tracing depth test

Passive Line Trace Mode includes Passive Power, Radio Broadband, and OmniSeek Broadband Modes. Broadband frequencies target any signal in a range of frequencies.

SR24 passive line tracing SR24 passive line tracing omniseek

Note: Active signals within a broadband range are also detected.


SR24 Line Trace Mode

Sonde Mode

Use Sonde Mode to locate a Sonde that is inside a pipe, conduit, or tunnel.

SR24 sonde locating


SR24 Sonde Mode


Note: Sonde Mode and Line Trace Mode can sometimes use the same frequency. Make sure the mode icon next to the frequency that you are using is the mode you intend to be locating with. Depth measurements will be in error if the incorrect mode is used.


User Programmable Custom Frequencies


The SR‑24 comes pre-programmed with a selection of frequencies that are set by default in Active Line Trace Mode, Passive Line Trace Mode, and Sonde Mode. You can also create custom frequencies to use the SR‑24 with transmitters from most manufacturers.

How does Bluetooth work on my SeekTech SR-24?

The SR‑24 is compatible with Bluetooth 2.0 devices that use the RFCOMM profile, including  many smart phones, tablets, and GPS units. Refer to for a list of some models that have been tested to work with the SR‑24.

You can connect the SR‑24 to compatible Bluetooth devices and configure connection options from the Bluetooth Options menu.


Bluetooth Connection Method

To use Bluetooth you must connect the SR‑24 and your Bluetooth device. To initiate connection from your Bluetooth device, follow these steps:

  • Enable Bluetooth on your Bluetooth device.


  • Open the Bluetooth list and select the SR‑24 from the list. After connecting, the SR‑24 briefly displays the following image on screen.

SR24 Bluetooth 1

  • Make sure the status of the SR‑24 on your device’s Bluetooth list appears as connected. The SR‑24 has failed to connect when the image below displays on the SR‑24’s screen. The image displays until the Menu Key or the Select Key is pressed.

SR24 Bluetooth 2

  • Note: If there is a Bluetooth device present and the SR‑24 has failed to connect, repeat step 2.


  • Once connected, confirm the Bluetooth icon appears in the bottom right of the SR‑24’s screen.

Alternate Bluetooth Connection Method
Note: It is usually most convenient to initiate the Bluetooth connection to the SR‑24 from the Bluetooth device.
If you are unable to initiate the connection from your Bluetooth device try the alternate method from the SR‑24. To initiate the Bluetooth connection from the SR‑24’s Main Menu, follow these steps:

  • Make sure your Bluetooth device is enabled and discoverable.

Note: The Bluetooth device must be discoverable for the SR‑24 to find it.

  • Press the SR‑24’s Menu Key to open the Main Menu.
  • Use the Down Arrow Key to highlight the Bluetooth Options icon and press the Select Key to open the Bluetooth Options menu.
  • Highlight the Search icon and press the Select Key to search for Bluetooth devices.

Note: If there is a Bluetooth device present and the SR‑24 has failed to find the Bluetooth device, make sure the Bluetooth device is discoverable.

  • Use the Down Arrow Key to highlight the device you want to connect to.

Note: New Bluetooth devices appear below the previously paired devices in the Bluetooth  options menu.

  • Press the Select Key to connect the SR‑24 to the Bluetooth device.


Confirming Bluetooth Connection

  • During operation, confirm your Bluetooth device is connected to the SR‑24 by observing the Bluetooth icon in the bottom right of the screen.

SR24 Bluetooth 3


Disconnecting Bluetooth

  • There are two ways to disconnect the SR‑24 and your Bluetooth device. Disconnect Bluetooth from your Bluetooth device or from the SR‑24’s Main Menu.

Note: Refer to your Bluetooth device for information on
how to disconnect a Bluetooth connection from your
Bluetooth device.

  • To disconnect the SR‑24 and your Bluetooth device from the SR‑24’s Main Menu, follow these steps:
  • Press the Menu Key to open the Main Menu.
  • Use the Down Arrow Key to highlight the Bluetooth Options icon and press the Select Key to open the Bluetooth Options menu.
  • Highlight the Disconnect icon and press the Select Key to disconnect the SR‑24 and your Bluetooth device. When disconnected, the Disconnect icon will change back to the Search icon .
  • Press the Menu Key to exit.

Note: To make changes to the Pin, Bluetooth Power, or to view the Bluetooth Information screen, you must first disconnect the Bluetooth.


Bluetooth Pin
Some Bluetooth devices require a pin to connect to the SR‑24. If a pin is necessary, enter the SR‑24’s pin into your Bluetooth device.

  • The default pin is 1234.

If desired, you can change the SR‑24’s Bluetooth pin on the SR‑24. To change the SR‑24’s pin, follow these steps:

  • Disconnect the SR‑24 and your Bluetooth device.

Note: Refer to the previous section for instructions on how to disconnect the SR‑24 and your
Bluetooth device.

  • Highlight the Bluetooth Pin icon in the Bluetooth Options menu and press the Select Key to open the Bluetooth Pin screen.

SR24 Bluetooth 4

  • Use the Left and Right Arrow Keys to move between digits and use the Up and Down Arrow Keys to increase and decrease the value of the digits.
  • Press the Select Key to save the pin and exit the Bluetooth Pin screen.
  • To abort any changes to the pin, press the Menu Key to return to the Bluetooth Options menu.

Bluetooth Auto-Connect

  • After connecting for the first time, the SR‑24 no longer requires a pin to connect to that Bluetooth device. When the SR‑24 is powered on, it automatically searches for any device that has previously connected to. The SR‑24 automatically connects if it is within range of a previously connected device and the device is available.

Note: The device does not need to be discoverable to
reconnect to the SR‑24.

  • The SR‑24 can save up to sixteen Bluetooth devices. When maximum capacity is reached and a new Bluetooth device is added, the SR‑24 replaces an old Bluetooth device with the new Bluetooth device in the list below the Search icon in the Bluetooth Options menu.
  • The SR‑24 continues to attempt to auto-connect if you disconnect the Bluetooth connection from your Bluetooth device. To disconnect an automatically connected device from the SR‑24 you must do so from the SR‑24’s Bluetooth menu. Refer to the Disconnecting Bluetooth section for instructions on how to disconnect Bluetooth.
  • Once you have disconnected an auto-connected device from the SR‑24, no further automatic connection attempts will be made for the remainder of that power cycle. When the SR‑24 is powered off and then powered on, the Bluetooth reinstates its default setting and attempts to auto-connect to any previously connected device within range.
  • The SR‑24 searches for all previously connected devices within range. The SR‑24 connects to the previously connected device that is available. If more than one previously connected device is in range and available, the SR‑24 attempts to connect to one, beginning at the top of the list, and going down the list until connected.

If you want to connect to a device that the SR‑24 did not
automatically connect to, follow these steps:

  • Press the Menu Key to open the Main Menu.
  • Use the Down Arrow Key to highlight the Bluetooth Options icon.
  • Press the Select Key to open the Bluetooth Options menu. The name of the previously connected device appears with an asterisk below the Search icon in the Bluetooth Options menu. The following image shows as a device that has previously been connected to the SR‑24.

SR24 Bluetooth 5

If you are no longer using a Bluetooth device, you can remove it from the list of previously connected devices, follow these steps:

  • Open the list of previously connected devices. Use the Down Arrow Key to highlight the device you want to remove from the list.
  • Press and hold the Select Key for about one second.
  • Press the Select Key to delete the Bluetooth device from the list of previously connected devices or press the Menu Key to return to the previous screen.

Bluetooth Power Settings


  • To change the Bluetooth power settings from high (default) to low, you must disconnect the SR‑24 and the Bluetooth device. Then use the Down Arrow Key from the Bluetooth Options menu to highlight the Bluetooth Power icon . Press the Select Key to toggle between high and low . Press the Menu Key to save and exit.

To view the Bluetooth Information screen, follow these

  1. Press the Menu Key to open the Main Menu.
  2. Use the Down Arrow Key to highlight the Bluetooth Options icon.
  3. Press the Select Key to open the Bluetooth Options menu.
  4. Highlight the Information icon and press the Select Key .


Pairing Instructions for the SeekTech SR-24 Locator and the Trimble GeoExplorer 6000 Series (PDF)


How does GPS work on the Ridgid SeekTech SR-24?

The SR‑24 has an internal GPS receiver that provides location data to the receiver. The GPS data is stored on the SD card and can be logged to a Bluetooth device through a Bluetooth connection.


Note: Refer to the Data Logging section of the SR-24 Operator’s Manual for instructions on how to export data log files to your computer.


The SR‑24 is compatible with Bluetooth 2.0 devices including many phones, tablets, and GPS units. Refer to for a list some models that have been tested to work with the SR‑24.


GPS Accuracy


GPS accuracy is measured in a variety of different ways, all are statistical in nature. According to the doc­umentation supplied by the manufacturer of the inter­nal SiRFstarIV GPS module, its nominal accuracy is “< 2.5 m (65 percent, 24 hour static, -130 dBm)”. This indicates that under ideal conditions, the GPS receiv­er is capable of accuracy such that each point collect­ed would have a 65 percent chance of being inside a circle with a 2.5 m [8.2 ft] radius extending from the true location. It is able to do this under ideal conditions with a strong signal (- 130 dBm) over a 24 hour test, during which the GPS unit is not moving.


The actual accuracy of a GPS device is highly variable and based on many factors such as obstacles in the physical environment, atmospheric conditions, and the quality of the GPS satellite constellation.


The GPS icon displayed on screen indicates the status of the position fix.  The GPS Status icon SR24 GPS 1 indicates that the GPS is searching for a position solution. When the SR‑24 GPS finds a position solution, the GPS Estimated Positional Error icon, for example  SR24 GPS 2, appears on the SR‑24 screen to indicate the SiRFstarIV’s position lock status and to provide an estimated positional error.


The estimated positional error indicates that a given solution is within the stated accuracy, approximately 65 percent of the time. In the following example, 65 percent of the solutions would be within a circle with a 4 m [13 ft] radius. For example, the following graphic shows the SiRFstarIV’s actual position is inside the circle, 65 per­cent of the time.

SR24 GPS 3

Using the SR24 with External GPS Software

The SR‑24 can communicate the SIG, GPS, or LCD data it collects to external GPS mapping devices and GIS software. To interpret the SR‑24’s data, the exter­nal GPS software and the SR‑24 must be connected through Bluetooth and the GPS software must be able to interpret data from a Bluetooth source.

Note: For specifications on external GPS software accu­racy, consult the external GPS vendor.


SR24 GPS 4

How do I interpret the sounds and audio cues coming from my SeekTech SR-24?

In all modes, if the sound level reaches its maximum frequency range (pitch), it re-scales to the middle of its frequency range. The modulation of frequency is used to indicate signal strength.


Line Trace Modes


The SR‑24 emits sounds related to the estimated position of the utility. If the utility’s estimated position is on the left side of the receiver, you will hear a warbling sound. If the utility’s estimated position is on the right side of the receiver, you will hear the same warbling sound plus short clicks.

In Active Line Trace Mode and Passive Line Trace Mode, the SR‑24 emits a higher pitch as it approaches the target. The rising pitch indicates an increasingly strong Signal Strength.

When local conditions distort the shape of the signal field, the Tracing Line is fuzzy and the audio contains static. The degree of fuzziness and the amount of static in the audio reflect the amount of distortion detected in the signal field.


Sonde Mode


In Sonde Mode, the pitch rises and falls relative to changes in the Signal Strength. As the SR‑24 moves away from the Sonde, the pitch falls. As the SR‑24 moves closer to the Sonde, the pitch rises.

What do all the icons, lines, and graphics mean on the SeekTech SR-24 display?

SR24 display line trace mode

SR24 line trace mode elements

SR24 display sonde mode

SR24 sonde mode elements

SR24 display lines

SR24 display distortion

Where can I find troubleshooting suggestions for SR-24 Issues?
Problem Probable Fault Solution
SR‑24 locks up during use Power off the SR‑24 and then power on. Remove the batteries if the unit will not turn off. Replace the batteries if low.
SR‑24 will not pick up signal Make sure the mode and frequency are correctly set. Examine the transmitter connections and make necessary improvements. Relocate the transmitter, change the grounding or frequency, modify the proximity threshold, or change the signal focus control settings.
While line tracing, lines jump around the screen in the mapping display SR‑24 not receiving the signal or interference is present. Make sure the transmitter is well connected and grounded. Point the SR‑24 at either lead to ensure that adequate levels of current are flowing on the target line.
Use a higher frequency, connect to a different point on the line, or switch to Inductive Mode.
Determine and eliminate the source of distortion.
Make sure the batteries are fully charged.
While locating a Sonde, lines jump around the screen Sonde batteries may be low or Sonde may be too far away. Make sure the batteries in the Sonde are fully charged.
Start the Sonde locate with the Sonde located closer or perform an area search.
Place the antenna close to the Sonde to verify the signal. Note that Sondes have difficulty emitting signals through cast iron and ductile iron lines.
Increase the proximity threshold and try lower settings of signal focus control to improve the focus on weaker signals.
Distance between the Sonde and either pole not equal Sonde may be tilted or cast iron to plastic transition. Refer to the section of locating tilted Sondes.
Unit acts erratic and does not power off Batteries may be low. Replace batteries.
Display appears completely dark or completely light when on When the SR‑24 gets too hot, the LCD will darken. When it gets too cold, it will lighten. Power off the SR‑24 and then power on. Adjust the LCD contrast.
No sound is audible Adjust the sound level. Verify that the Proximity Number is greater than zero.
The SR‑24 will not power on Faulty batteries or blown fuse. Check the orientation of the batteries and that they are fully charged. Make sure the battery contacts are not damaged. Fuse is not user-