RD7200 vs RD8200, RD8200G and RD8200SG: Which to Buy?
Choose an RD7200 for a focused precision locating system, an RD8200 for additional signal-identification tools and compatible remote transmitter control, an RD8200G when you also need GPS usage records, or an RD8200SG for an integrated survey-grade positioning workflow. Then choose the transmitter and accessories for the functions you will actually use.
These receivers help operators investigate electromagnetic signals from buried services. The letters after the model number matter: GPS records, locating measurements and survey-grade coordinates are different outputs. A higher model number does not guarantee that every service will be detected.
Compare the four models
| Receiver | What distinguishes it | Choose it when |
|---|---|---|
| RD7200 | Eight active frequencies, Power Filters and supported A-Frame fault finding. | You need precision cable and pipe tracing without the RD8200's Current Direction and iLOC functions. |
| RD8200 | A broader active-frequency selection, Current Direction and iLOC with compatible transmitting equipment. | You need more ways to investigate a target response in a congested network. |
| RD8200G | RD8200 locating functions with onboard GPS and automatic usage logging. | Supervisors need operating records with position information for review. |
| RD8200SG | Integrated survey-grade GNSS alongside precision locating. | Your job includes collecting mapped utility positions through a compatible app and correction-service workflow. |
Do GPS records mean survey-grade mapping?
No. The RD8200G's GPS usage records help show how and where equipment was operated. They do not turn every locate into a centimetre-accurate survey. The RD8200SG has an integrated survey-grade GNSS system; its RTK workflow needs suitable correction data, compatible software and positioning conditions. Mobile connectivity, app access and correction subscriptions are separate buying considerations.
Positioning accuracy and locating accuracy also describe different things. A precise GNSS coordinate cannot correct a trace taken from the wrong utility or a distorted electromagnetic signal.
Choose the transmitter as part of the system
A receiver listens for a signal; a transmitter applies one. Both must support the selected frequency and method. Current Direction requires appropriate transmitting equipment as well as a CD-capable receiver. iLOC remote control needs a compatible iLOC transmitter; a Bluetooth or GPS feature elsewhere in a kit does not establish that compatibility.
For fault finding, the RD7200 and RD8200 specifications describe supported modes used with an A-Frame and compatible transmitter. That is different from tracing a service's route. Check the required fault-find signal on both instruments.
For compatible supporting equipment, choose transmitters, clamps and RD accessories.
Receiver only, kit, new or refurbished?
Compare the exact supplied offer, not just its photograph. A receiver-only offer may need a transmitter, connection kit, clamp and carrying equipment. A named kit can have different contents from another kit built around the same receiver. Read its itemised contents and distinguish included equipment from paid selections.
For the manufacturer's standard 10/RD8200SG package, the listed contents are the locator, USB-C lead, Li-ion rechargeable battery pack, mains charger and mains lead. The distinct 10/RD8200SG-KIT adds a phone holder and soft carry bag. Neither manufacturer's package lists a transmitter. A seller-built bundle is a separate offer and should have its own itemised contents.
New, refurbished, used, ex-display and ex-demo labels describe the seller's individual offer. Compare its stated condition, warranty, calibration documentation and supplied accessories separately. Do not assume that a legacy RD7000, RD8000 or RD8100 shares the features of the current model with a similar name; its full suffix and generation determine the specification.
Check these points before ordering
- The locating frequencies and functions required for your work.
- The exact transmitter version and any iLOC or Current Direction requirement.
- Whether GPS usage records or survey-grade mapping are actually needed.
- Included batteries, chargers, leads and carrying equipment.
- The offer's condition, warranty and calibration documentation.
Browse precision locators and kits and RD precision locator accessories. For ownership checks, see why calibration and equipment checks matter.
Use the result within a safe system of work
A locator response is evidence to investigate. Silence does not prove that the ground is clear, and a displayed depth is not a safe mechanical excavation limit. HSE's HSG47 combines planning, locating and identifying services, and safe excavation; equipment choice supports that process.
Technical references
See Radiodetection's RD7200 documentation, RD8200 family documentation, RD8200SG documentation and RD7200/RD8200 model comparison, plus HSE HSG47. Use the instructions for the exact instrument and software revision supplied.