| Strommen·Systems Tested · Honest Notes · Pennsylvania | View all items → |
Heads-up: light bench wear on the housing and minor handling marks on the black platform; nothing cracked, bent, or missing. The unit ran smoothly and quietly on the bench with no walking or knocking. — called out so there are no surprises.
Functional: Bench-tested and working. Powers on, the speed and time displays light and respond to the up/down arrows, and the unit runs and shakes correctly at multiple speed settings across the range. Run, stop, on and off keys all respond and the timer counts down and stops the platform as it should.
Cosmetic: Clean used lab condition. Housing is bright with light bench wear, both LED displays are fully legible with no dead segments, and the membrane keypad is intact with no lifting or tears. All four adjustable posts, all eight plate clamps and the upper platform are present and undamaged.
- ✓ Powers on — both speed and time LED displays light fully
- ✓ Runs and shakes at multiple speed settings across the range
- ✓ Speed display verified reading 600 RPM under power (see photos)
- ✓ Speed and time up/down arrow keys adjust their displays
- ✓ Run / stop / on / off keys respond
- ✓ Digital timer counts down and stops the platform at zero
- ✓ Runs smoothly on its suction-cup feet with no walking or knocking
- ✓ Original captive power cord present and used for the test
- — RS-232 data output to a computer (DB9 port is present, not exercised)
- — Speed accuracy against a calibrated tachometer — not verified to the ±25 RPM factory spec
- — Pulse mode timing accuracy
- — Sustained run beyond the bench test
- — No microplates were on hand, so the unit was run unloaded
- ✓ VWR DMS-2500 High Speed Microplate Shaker
- ✓ Upper clamping platform with 8 plate clamps
- ✓ 4 adjustable stainless support posts with thumb screws
- ✓ Attached AC power cord
- ✗ Microplates or any plate adapters
- ✗ Manual, software or RS-232 cable
- ✗ Calibration certificate — sold uncalibrated
- ✗ Original box
| Model | VWR DMS-2500 High Speed Micro Plate Shaker |
|---|---|
| Catalog No. | 13500-890 |
| Manufacturer | Built in the U.S.A. by Troemner LLC (P.N. 945120) |
| Serial No. | 190111001 |
| Speed range | 600 to 2500 RPM, digital control |
| Timer | 1 to 9999 seconds (about 166 minutes), plus pulse mode |
| Plate capacity | Up to 6 microplates |
| Max platform load | 3.2 kg (7 lb) |
| Vessel height | Tray adjustable to accept vessels up to 12.7 cm (5 in) |
| Interface | RS-232 (DB9, rear panel) |
| Power | 120 V, 120 W, 50-60 Hz, 1 phase |
| Fuse | 5 x 20 mm, 5 A 250 V quick-acting |
| Unit weight | About 22.7 kg (50 lb) |
Shipping: Calculated shipping from Philadelphia, PA — you pay the actual carrier rate for your address, with nothing padded on top. Local pickup in Philadelphia is free. Because of the weight and size, please check the calculated rate before you buy.
Local pickup: Free local pickup in Philadelphia, PA — message after purchase to arrange a time.
Returns: Returns accepted as described — message with any questions before you buy. Calibration is not certified unless stated.
| Strommen·Systems | Philadelphia, PA · Tested to the level described · Honest condition notes |