Probe Sonicator Sound Enclosure — Small | Fisherbrand FB50/FB120, Qsonica Q55/Q125

Qsonica sells the box for $900. Fisher rebadges the same box for $1,841. Neither one is lined for you.

Ours is $2,295, delivered assembled, acoustically lined, and crated to your dock.

The FB432A and the Qsonica 432B2 are the same enclosure — one goes through a lab distributor and one does not, and the spread is roughly two to one. We are not in that argument. We build a different thing: a hand-lined, gasketed, compression-latched box that shows up ready to work.

What it is for

A 20 kHz probe running at power produces a high-frequency screech that is genuinely painful and drives everybody out of a shared room. It is an occupancy problem before it is a hearing problem — the person three benches away stops working. Second job: probe sonication of biological samples generates aerosol, and a closed box with a latched door is the standard engineering control.

How it works, mechanically

Two things in series. Mass — the panel itself blocks transmission. Absorption — open-cell foam lining the interior kills the reverberant buildup that would otherwise leak straight back out the seams. Neither one works without the other, and neither works at all if the box leaks.

Why this is not a flat-pack

Seam leakage is where these fail. A bracket-and-panel enclosure has continuous seams, and an unsealed seam hands you a fraction of the reduction you paid for. So every joint gets closed-cell gasket tape laid by hand. The door gets a compression latch, not a magnet — a magnet holds a door shut, it does not pull it into a gasket. And the lining is cut and fitted to each interior face rather than dropped in as a sheet.

That is six hours of bench work before it is crated, and it is the reason this is not a kit any more.

Specification

• ✅ Interior 12" W × 12" D × 20" H — fits Fisherbrand FB50 and FB120, Qsonica Q55 and Q125, Cole-Parmer CPX series, Hielscher UP200Ht
• ✅ Delivered assembled — uncrate it, set it on the bench, put your converter through the slot
• ✅ Closed-cell gasket at every seam, hand-laid
• ✅ Hinged front door with compression latch and a clear viewing panel
• ✅ Gasketed converter slot in the top panel for the probe and horn
• ✅ Two cable grommets for coolant lines and a thermocouple
• ✅ Open-cell acoustic foam lining, cut and fitted to all six interior faces
• ✅ Crated on a skid and shipped LTL freight

What you supply

Your own converter stand or horn clamp. We cut and gasket the slot the horn passes through, but we do not supply the support hardware — every converter mounts differently and yours almost certainly came with the right one.

Straight talk about numbers

Other vendors publish a dB figure. We do not, because we have not measured ours, and we do not put numbers on a listing that we cannot stand behind. We will tell you exactly what it is built from — panel thickness, gasket type, foam, latch — and let you judge. If you need a verified attenuation figure for an EHS file, buy from someone who has tested and published one. We would rather lose the order than invent a number.

Delivery

Built to order in Rocklin, California. Lead time is 15 business days for assembled units. Ships crated on a skid via LTL freight, calculated at checkout from your delivery address.

Tell us before you order if your receiving point cannot take a standard trailer — liftgate and limited-access delivery are quoted separately, and it is cheaper to know up front than to reconsign a crate in transit.

One-year warranty and a 100% satisfaction guarantee. Returns on crated freight items are arranged with us directly — call before shipping anything back.