A buyer searching for Door Sensor is usually trying to stop a bad substitute. A security device here means an overt camera, recorder, or alarm for a site you control. Specify coverage, light, storage, and the network. Do not use this as a guide to hide a camera or record people in private spaces. The notes below are selection criteria for a Door Sensor. They are not a catalog promise. Confirm every rating on the current datasheet, drawing, or test report for the revision you will receive.
What has to be true of Door Sensor
A security device here means an overt camera, recorder, or alarm for a site you control. Specify coverage, light, storage, and the network. Do not use this as a guide to hide a camera or record people in private spaces. For a Door Sensor, start from the duty, then the interface to the rest of the machine or the room, then the document that proves the claim. A lower price that leaves one of those blank is a different product.
Door Sensor is easy to confuse with Card Reader Access. If the quote could be read as either, add the line that separates them: the rating, the fitment, or the standard named below. Link the drawing number to that line so receiving inspection can reject the wrong one.
Numbers that change the quote
| Line | What to write for Door Sensor |
|---|---|
| Coverage | What must be seen, at what distance, day and night. |
| Image | Resolution and the low-light behavior, in the manufacturer’s terms. |
| Power and network | PoE, mains, or the stated link. |
| Storage | Days of retention and where the drive sits. |
| Mounting | Overt housing and the IP code of an outdoor camera. |
| Rules | Whether signs, consent, or a local rule apply to this site. |
How to compare two offers
Lay both quotes for Door Sensor on one sheet and line up coverage, image, and power and network. If a cell is empty, the offer is not finished. Ask for the missing line in writing. When those match, the honest difference is lead time, the test evidence, and who carries the warranty. Do not average a fully specified Door Sensor with a cheaper line that omitted coverage.
Documents worth having before the deposit
Ask for a lens calculator or a stated field of view, and keep the camera overt. The file should name Door Sensor and the revision, not only the supplier’s homepage. A factory quality certificate such as ISO 9001 can sit beside that file. It does not replace it.
Failures that show up after delivery
- Putting an indoor camera outside.
- Specifying a hidden install. That is out of scope for this desk.
- Buying resolution and forgetting light and storage.
On a Door Sensor, the expensive version of the first mistake is discovering it after the goods are in the crate. Put the rejection condition in the purchase order while the supplier can still restate the offer.
A worked RFQ line
Use this shape, then replace the brackets with your duty: “Door Sensor — State coverage, light, power, retention, and an overt mount.” That sentence is a template, not a rating of any brand. If a supplier’s datasheet uses different units, convert them onto this sheet so the next offer can be compared.
Where words like waterproof / IP65 belong
Searches often add a constraint to Door Sensor: waterproof / IP65, or OEM / custom. Keep those on this page. IP65 in IEC 60529 means dust-tight and protected against water jets. Write that code if hoses are the real exposure. The word waterproof alone does not name a test. OEM or custom means a drawing, a revision, and a statement of who owns the tool. Without those, you are buying the catalog part. If you need a third constraint, add it as another line on the same drawing. A second URL that only swaps the adjective does not give a buyer a second fact.
Related in this section: how to specify Card Reader Access.
Questions buyers actually ask
What should an RFQ for Door Sensor include?
State coverage, light, power, retention, and an overt mount.
Is a cheaper Door Sensor the same part?
Only if coverage, image, and the documents match. A missing line is a different offer.
Do waterproof, OEM, or IP words need their own page?
No. For Door Sensor they are extra lines on this specification. Ask for the test or the drawing that gives the word a value.