# MaxBotix MB1242 I2CXL-MaxSonar-EZ4 ultrasonic sensor: PCB, 2 mounting holes and transducer

> What are the MaxBotix MB1242 I2CXL-MaxSonar-EZ4 dimensions and mounting-hole positions?

- Category: Electronic components › Modules, sensors & displays
- Kind: Modern device
- Basis: MaxBotix's own XL-MaxSonar-EZ STEP model, consistent with the I2CXL-MaxSonar-EZ datasheet mechanical table.
- Page: https://xemstudio.com/objects/maxbotix-mb1242-xl-maxsonar-ez4/ · JSON: https://xemstudio.com/api/geometry?object=maxbotix-mb1242-xl-maxsonar-ez4 · Plain text: https://xemstudio.com/objects/maxbotix-mb1242-xl-maxsonar-ez4/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 22.1 | 19.94 | 15.6 |

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- Datum: lower-left PCB corner (pin row along the left edge), board bottom at 0. PCB 22.10 × 19.94 × 1.68.
- Two Ø3.30 mounting holes, diagonal pair at (2.54, 17.40) and (19.56, 4.45).
- Transducer Ø15.24 centred at (11.05, 10.85), its face 15.60 above the board bottom (13.92 above the board top).
- Not modelled: the 7-pin 0.1 in header and its pins (they point down about 9.5, so keep 10 clear under the board) and small components.
- All dimensions are exact nominal millimetres, true size, with no tolerance added.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| Mounting holes | 2 × Ø3.30 diagonal pair | M3 or 4-40 screws and standoffs | designed | all |
| Transducer | Ø15.24, face 15.60 above the board bottom | round opening in a panel or sensor housing | designed | all |

## Sizes

| feature | x (mm) | y (mm) | diameter (mm) |
|---|---|---|---|
| hole 1 | 2.54 | 17.40 | 3.30 |
| hole 2 | 19.56 | 4.45 | 3.30 |
| transducer | 11.05 | 10.85 | 15.24 |

## Where the files are

- MaxBotix: [I2CXL-MaxSonar-EZ datasheet](https://maxbotix.com/pages/i2cxl-maxsonar-ez-datasheet) — web — Publisher's page; dimensions are facts
- MaxBotix: [XL-MaxSonar-EZ 3D model (STEP)](https://cdn.shopify.com/s/files/1/0550/8091/0899/files/XL-MaxSonar-EZ.stp) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/maxbotix-mb1242-xl-maxsonar-ez4/index.json

- maxbotix-mb1242-xl-maxsonar-ez4: [STEP](https://xemstudio.com/files/hardware/maxbotix-mb1242-xl-maxsonar-ez4/maxbotix-mb1242-xl-maxsonar-ez4.step) · [STL](https://xemstudio.com/files/hardware/maxbotix-mb1242-xl-maxsonar-ez4/maxbotix-mb1242-xl-maxsonar-ez4.stl) — MaxBotix MB1242 I2CXL-MaxSonar-EZ4 ultrasonic sensor: PCB, 2 mounting holes and transducer

## Questions

**How big is the MaxBotix MB1242?**

PCB 22.10 × 19.94 × 1.68 mm; 15.60 mm tall to the transducer face.

**What size hole does the MB1242 transducer need?**

The transducer is Ø15.24 mm, centred at (11.05, 10.85) mm from the lower-left PCB corner.

**Where are the MB1242 mounting holes?**

Two Ø3.30 holes at (2.54, 17.40) and (19.56, 4.45) mm from the lower-left PCB corner.

## Fits with

- [HC-SR04 ultrasonic sensor](https://xemstudio.com/objects/hc-sr04-ultrasonic-sensor/)
- [2.54 mm pin headers, 1×2 to 2×20, vertical and right-angle](https://xemstudio.com/objects/pin-headers-2.54mm/)
- [Threaded standoffs, M2.5 and M3 (hex and round)](https://xemstudio.com/objects/threaded-standoffs-metric/)
- [Imperial machine screws: #4-40, #6-32, #8-32, 1/4-20](https://xemstudio.com/objects/imperial-machine-screws/)
- [Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)](https://xemstudio.com/objects/socket-head-cap-screws-metric/)