# NA1-PK5 sensor enquiry

**URL:** <https://forum.digikey.com/t/na1-pk5-sensor-enquiry/8083>\
**Category:** Sensors Transducers\
**Tags:** panasonic, industrial-automation-and-controls, site-help-information-and-feedback\
**Created:** [August 19, 2020, 6:28am UTC](https://forum.digikey.com/t/na1-pk5-sensor-enquiry/8083 "2020-08-19T06:28:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![zazas321](https://avatars.discourse-cdn.com/v4/letter/z/59ef9b/32.png) [@zazas321](https://forum.digikey.com/u/zazas321)\
**Post date:** [August 19, 2020, 6:28am UTC](https://forum.digikey.com/t/na1-pk5-sensor-enquiry/8083/1 "2020-08-19T06:28:05Z")

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Hey. I need to know whether this sensor comes as a pair if purchased from Digikey. Does it contain a receiver and emmiter pair? Cannot get a hold on technical advisor through live chat. Thanks for replies

> **[NA1-PK5 | Digi-Key Electronics](https://www.digikey.com/en/products/detail/panasonic-industrial-automation-sales/NA1-PK5/3899514)**
>
> Order today, ships today. NA1-PK5 – Through-Beam Optical Sensor 3.937" (100mm) NPN - Open Collector from Panasonic Industrial Automation Sales. Pricing and Availability on millions of electronic components from Digi-Key Electronics.

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**Author:** ![rick\_1976](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/rick_1976/32/1571_2.png) [@rick\_1976](https://forum.digikey.com/u/rick_1976)\
**Post date:** [August 19, 2020, 1:21pm UTC](https://forum.digikey.com/t/na1-pk5-sensor-enquiry/8083/2 "2020-08-19T13:21:42Z")

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Greetings,

It appears that these are sold as emitter/receiver pairs, given the lack of separate part numbers for either specified in the product datasheet.