Yes. The Hanna is in conductivity uS which is what you want need. You have to use a math formula to get ppm of Silver but the conductivity reading is close enough even without the formula. This meter is very simple.
The COM-100 has both Conductivity plus Total Dissolved Solids. TDS does not work for ionic silver. It has a much larger range so you can also measure your tap water. This larger range is usually undesirable as the error will be much more but this meter has three curves. Resolution: 0-99: .1 µS/ppm; 100-999: 1 µS/ppm; 1000-9990: 10 µS/ppm. Temp. resolution is .1 °C/F
If your a techy that likes to fool with things you'll probably want the COM-100 as it has much more features and costs less. If you just want to measure your distilled water before and after making silver without much trouble or thinking you'll want the Hanna.