The 3.5 mm sensing distance decides where it fits
The EE-SA801R-R 1M: Max sensing distance is 3.5 mm — that's close. You're not using this for long-range detection. It's for verifying a part is pressed against a fixture, or confirming a plunger is home. The pushbutton actuator lets you set the threshold without a pot; just press to teach the light condition. Operation is 'ON with no load' (light-on), meaning the output is high when the beam isn't blocked. Watch that logic if you're swapping it into a dark-on circuit.
Why the E3Z-D82K 2M won't drop in
Someone asked whether the E3Z-D82K 2M fits as a second-source. It doesn't. That E3Z is a general-purpose diffuse photoelectric with a 1 m range, IP67, rectangular body, and a selectable light/dark mode. This seed part is a pushbutton-type photomicro with a 3.5 mm limit, no IP rating, and fixed ON-with-no-load output. The mounting hole pattern and wiring aren't the same, and the sensing distance is two orders of magnitude off. They're different tools for different jobs.