Direct Answer
A prize sensor (also called a prize detection sensor) is primarily used to count how many prizes the machine dispenses. As a prize passes through the chute, the sensor sends a detection signal that the control board can use to record an outgoing prize. The mainboard records plays or inputs separately; when supported, its play count and detected prize count can be compared to assess prizes dispensed per play. The prize sensor alone does not count plays, calculate daily sales or guarantee an automatic claw-strength adjustment.
What Is a Prize Sensor?
A prize sensor is an optical detection device, often using infrared light. In a through-beam version, an emitter and receiver face each other across the prize path; a passing prize interrupts the beam. Other optical arrangements are possible, so use the actual machine's diagram.
The sensor detects a change at its mounting position. When properly installed and configured, this helps the board count dispensed prizes. Debris, a hand, packaging, misalignment or a prize missing the light path can cause a detection count to differ from the number actually delivered. Check the chute and counting behavior in use.
Where Is the Prize Sensor Located?
It is fitted along the prize path into the chute or retrieval area. Mounting positions vary with the cabinet, chute design and kit version; there is no universal mid-chute height for every Hiclawcrane kit.
- Near the chute entrance: may detect an item entering the drop path.
- Within the chute: can detect an item passing through the aligned light path.
- Near the collection area: must account for the chute shape and normal prize flow.
Check the actual kit and cabinet before choosing a mounting point.
How the Prize Sensor Signals the Mainboard
- The sensor establishes its normal optical detection state according to its rated supply and output type.
- A prize passing through the monitored path interrupts or changes the light received.
- The sensor output changes according to its pinout.
- The configured board input detects that change.
- The board can register a dispensed-prize event and update a prize count, depending on the model's functions and settings.
That input is for prize detection and counting, not for counting plays. A sensor event is not by itself a paid win, a sale or proof that the player retrieved the prize. Not every edition has a visible prize-count display.
Prize Counting and Game Records
Keep the records separate: the prize sensor contributes detected outgoing-prize events; the mainboard records plays or inputs according to its own functions; payment records supply amounts needed for sales reporting. If the board supports these figures, an operator can compare detected prizes with plays to analyze a prize-per-play ratio. That ratio is not the same as monetary payout or profit, and it is only as reliable as the underlying counts.
Some boards may use prize counts in additional settings, but do not assume the sensor automatically adjusts claw strength, enforces a target win rate or warns that stock is low. Verify the exact board menu before interpreting its figures.
Common Prize Sensor Faults
| Symptom | Possible cause | First check |
|---|---|---|
| Prize drops but count does not increase | Prize misses optical path, misalignment, dirty lens, loose plug, missing supply or input setting | Watch a test prize pass; inspect the light path, connector and board count/input settings |
| Count increases without a prize | Hand, debris, packaging, vibration, intermittent connection or misalignment | Clear the chute and watch the input while inspecting light path and cabling |
| Displayed count does not change | Display may not show this count, or sensor/input may not register | Check this board's count display and input-test procedure |
| Machine pauses or behaves unexpectedly | Board setting, limit input, power or another issue, possibly including this input | Check the exact symptom and board diagnostics; do not replace the sensor solely on this symptom |
| Input remains active | Blocked path, dirt, connection or failed component | Remove obstruction and compare input state with the manual |
How to Test a Prize Sensor
- Locate the fitted sensor and input in the kit's wiring diagram.
- Inspect lens cleanliness, alignment, connectors and the actual prize path.
- If the board has an input-test or prize-count display, use the documented procedure and pass a suitable test object through the light path. Check whether the input changes and, where supported, whether one dispensed prize produces one count.
- If there is no response, check the rated supply and board setting. Disconnect power before reseating connectors.
- Use direct electrical measurements only with the device's rated supply, pinout and expected output specification; do not assume a universal 5V or 12V signal.
Repeat with intended prizes. One test object triggering the sensor does not prove reliable counting across prize shapes, packaging and drop paths.
Replacing a Prize Sensor
Check for obstruction, alignment and wiring faults before replacement. For a confirmed failure:
- Disconnect power and identify the fitted part and mounting position.
- Record the connector pinout and orientation using the kit diagram.
- Select a replacement with the correct supply, output type, connector and mounting fit.
- Install, align and route its cable away from moving parts; reconnect by the diagram, not color alone.
- Test with the board input or count function and a suitable prize passing through the chute.
Check compatibility and pack quantity when ordering from arcade spare parts.
Frequently Asked Questions
Do all claw machine kits include a prize sensor?
No. Inclusion depends on the exact kit edition, not simply gantry size or commercial use. Check the selected kit's included-parts list.
What does a prize sensor mainly do?
It detects a prize passing through the chute so the board can count prizes dispensed. The mainboard records plays separately; the sensor alone cannot report play count, daily sales or profit.
Can the machine run without a prize sensor?
That depends on the board and settings. If the input is absent or faulty, prize counts may be missing or wrong; other game behavior varies by model. Check the board instructions rather than bypassing the input.
How long does a prize sensor last?
There is no universal lifetime. If counts become unreliable, inspect the optical path, alignment, cable and connectors, then test the component before replacing it.