Simultaneous multi-frequency transmits and processes several frequencies together; selectable-frequency models let the operator choose a single frequency or mode.
“Multi-frequency” can describe more than one operating method. Simultaneous systems process multiple frequencies together; selectable-frequency systems let the operator choose one frequency at a time. Some detector models offer both approaches.
| Mode | How it works | Buyer consideration |
|---|---|---|
| Simultaneous multi-frequency | Multiple frequencies are transmitted and processed together | Simple broad coverage when the model supports your intended ground and targets |
| Selectable single frequency | The operator chooses one frequency | More control over a specific target or environment, but requires a deliberate setting choice |
| Detector with both | Offers a simultaneous mode and selectable options | Check which modes are available with each search profile |
A frequency’s response depends on target size and conductivity, ground mineralization, coil and detector processing. Manufacturer guidance often describes lower frequencies as favoring larger or more conductive objects and higher frequencies as responsive to small or low-conductivity targets, but these are tendencies rather than guarantees.
Some detectors combine simultaneous multi-frequency with selectable single-frequency modes. Others do not. Check the exact model’s manual, search profiles and firmware before choosing based on a feature name. Consider whether you want automatic broad coverage or hands-on control for a particular site.
Compare modes in the same location using a known target and stable settings. Follow the maker’s guidance for ground balance and saltwater use. The VLF vs multi-frequency vs pulse induction guide explains detector families, while the first-settings guide covers setup and learning one control at a time.
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Common questions
What does simultaneous multi-frequency mean?
The detector transmits, receives and processes more than one frequency at the same time, according to its manufacturer definition.
Can I select one frequency on a simultaneous detector?
Some models offer both simultaneous multi-frequency and selectable single-frequency modes; check the exact model.
Is simultaneous multi-frequency always better?
No universal mode wins every situation. Follow the detector manual and compare results for your targets and ground.