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Powder-Free Anti-Static Finger Cots for Handl...: Genuine Raytools capacity head sensor, part number 120AH1300A, for the Raytools BM109 fiber laser cutting head (flat sheet version).
The capacity head sensor is the assembly at the bottom of the head that carries the nozzle and turns the gap between nozzle and sheet into the signal the height controller follows. It holds the ceramic, the nozzle connector and the lock ring, and it is the part that takes the knock when the head collides. A damaged sensor shows as height alarms, a head that hunts up and down, or a nozzle that touches the sheet.
Square aluminium body with the side signal connector, ceramic ring, nozzle connector and knurled lock ring, as fitted to the BM109. Sold singly.
| Raytools Part Number | 120AH1300A |
| Fits | Raytools BM109 (flat sheet) |
| Part | Capacity head sensor (TRA) |
| Body | Aluminium, square base with side signal connector |
| Condition | New, genuine Raytools |
| Stat. HS-Code | 846693 |
| Country of Manufacture | China |
Raytools cutting heads
Raytools lists 120AH1300A for the BM109. The 3D tube cutting heads use 120800100B instead.
| Dimensions | Raytools Part No.(SPM Part No.) |
|---|---|
| Raytools BM109 (flat sheet) | 120AH1300A(SPM-LAS-4552) |
After a head collision
The capacity head sensor is the first part hit when the nozzle strikes a tipped part or the sheet. A cracked body or a damaged ceramic seat shows as height control alarms. A spare on the shelf gets the machine back the same day.
Height control that hunts or alarms
If the head bobs, cuts at the wrong height or throws sensor faults after the cable and amplifier check out, the sensor at the bottom of the head is the next part to change.
Planned spares for a fleet
Shops running several Raytools heads keep one sensor per head type on the shelf, because a machine without one cannot cut at all.
We check what other sellers of the genuine part charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| Laser Consumables AU, genuine Raytools | USD 196.95 | 30 Oct 2026 |
| Spare Part Mart | USD 157.56 | Today |
Our price of USD 157.56 is approximately 20% less than this seller.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it was made for the Raytools BM109 (flat sheet). Check the old capacity head sensor is marked the original part or one of the cross references, because makers change parts between serial ranges.
On the Raytools BM109 (flat sheet), there is no fixed interval. It is changed when it fails, and many fail from water in the plug or chafed wiring rather than wear.
A fault code for this circuit, readings that jump or stay fixed, or a part that does not respond with power at the plug.
Read the fault codes, then check the plug and wiring for corrosion or a broken wire. A wiring fault reads the same as a failed capacity head sensor.
Yes. Many machines have 12 V and 24 V versions of the same capacity head sensor. Check the old part or the machine plate before fitting.
No. It is an aftermarket capacity head sensor made to replace the the original part. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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