Dear Mr. Yong

Have you check the price of a QCM by OpenQCM, Noveatech, Italy.

https://store.openqcm.com/10-mhz-quartz-sensors-box-10-pieces.html

In my opinion they provided a good product with relatively "economical" prices.

Regards,

Aditya Rianjanu

Dear Dr Aditya,

That's a really good suggestion. Thank you.

Regards,

Ernest

Dear Ernset Yong

I recommend you to visit the Microvacum Ltd company's website, as I attached their link down below.

I do not have an exact idea about the price, but they mainly produce QCM-I (D) ( The resonance sensitivity of the instrument in liquid is 2 × 10−1 Hz, the dissipation sensitivity is 1 × 10−7 and the mass sensitivity is ≤ 1 ng/cm2, respectively) and mini QCM-I(D).

You can contact them directly and ask about more details.

https://qcm-sensors.com/product-category/qcm-biosensor-devices/

With the best of luck.

Larbi.

Dear Larbi,

Very much thanks for the suggestion. I will definitely look into it. Take care.

Regards,

Ernest

Dear Ernset Yong

You are welcome

My best wishes.

Larbi.

Dear Ernest Yong

for the prices you mentioned you wont get a reliable system with many capabilities.

But for the Poor-Man_Porch try the one of the following:

Choice 1-

try the mini-QCM-I which is a baby version of the larger sized QCM-I developed by MicroVacuum ltd in Hungary and marketed by Gamry, USA). it is recommend for multi purpose applications.

https://www.gamry.com/qcm/quartz-crystal-microbalance/qcm-i-mini-dissipation/

Choice 2-

the eQCM by Gamry instruments, it might satisfy your needs.

see more details at:

https://www.gamry.com/qcm/quartz-crystal-microbalance/eqcm-quartz-crystal-microbalance-2/

Good luck.

Best regards.

Shaban