I HEARD YOU....
 
Look i wasnt happy with the Standard Field Meters not being able to measure the duty cycle on most devices either.  There really wasnt much i could do to help that so i had to think up a different option.
 
Enter;  The Field Meter Pro.

Exact same Design (Almost litterally) as the Standard but we threw a Analogue Meter on it. 

This can pick up those faint fast signals and display them perfectly fine.
 
Display can be switched using the microswitch on the side.

Up Position - display readings on Analogue Display
Down Position - Activates Digital Display and displays readings.

because it is analogue it does not require a CR2032, that is only to see the standing wave on a digital readout.

On the back of the unit there are two test points labled VM1 and VM2  this is so you can connect a Volt Meter and get the readings yourself.  or design a ESP32 Visualizer and plot the data, IDK you're likely more creative than me.

Specifications:
 
Analogue Display:
Read Range 0-15 Volts/Meter x10
(If display says 5, actual reading is 50v/m
 
Digital Display:
0-100v/m

Battery(not included)
CR2032