This meter works great. Run a quarter over the coil and set the meter to 180 and it is deadly on coin ID. Also, I am including a clip that you can mount on your middle rod so the meter can be mounted on it...$199 Shipped
https://www.backwoodsmetaldetectors.com/product/sun-ray-dt-iii-meter-for-minelab-sovereign/
https://www.backwoodsmetaldetectors.com/product/sun-ray-dt-iii-meter-for-minelab-sovereign/