Metra SJ-A5 Ultrasonic Cleaner 50/55/60 kHz 500 ml 316 Stainless Steel

Target Users

The Metra SJ-A5 is a benchtop ultrasonic cleaner designed for jewellery, eyeglasses, non-digital watches, dentures and small accessories. It uses only tap water to deliver 360-degree cleaning without harsh chemicals, making it suitable for home users who want a simple way to maintain delicate items. The 316 food-grade stainless steel tank adds safety for objects that contact skin or mouth. It is not for buyers who need industrial throughput or heated cleaning cycles.

Tri-Frequency Operation

The single specification that decides fit is the 50/55/60 kHz triple-frequency output, which penetrates tiny crevices while protecting delicate patina on metal surfaces. Five preset timers — 180, 300, 420, 580 and 600 seconds — let you match cycle length to the item, with the longest mode recommended for fragile pieces such as pearls. Without this multi-frequency range and timed flexibility, the cleaner cannot address both stubborn grime and sensitive materials in one device.

Included Accessories

A plastic basket holds small parts securely during agitation, and a cloth is supplied for drying afterwards. The user manual and power lead complete the bundle so the unit runs straight from the mains. No cleaning solution is included; the machine works with tap water alone, though a moderate amount of jewellery cleaner can be added for tough stains. Buyers who expect a starter fluid or specialised inserts will need to source them separately.