OWON OEL8511
A programmable 200 W load for benches that may later gang several units on RS485.
Amazon $399$399
The OWON OEL8511 rates 3.1 among electronic loads bench power supplys; the B&K Precision 1687B rates 3.1 among single output ones. The OWON OEL8511 costs $9 less ($399 vs $408).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
B&K Precision 1687B
#7 in Single outputFull review
A durable name-brand switching supply for service benches and 24 V equipment, with a warranty the import brands do not offer.
Amazon $408$408
Scores side by side
These two sit in different type classes (electronic loads and single output), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | OWON OEL8511 | B&K Precision 1687B |
|---|---|---|
| Overall rating | 3.1/5 | 3.1/5 |
| Value 25% | 26 $2 per watt ($399, 200 W rated) | 42 $1.13 per watt ($408, 360 W rated) |
| Output quality 20% | 47 5 kHz dynamic mode | 33 5 mVrms ripple and noise |
| Resolution 15% | 75 1 mV / 1 mA setting resolution | 50 resolution not published (neutral score used) |
| PC control 15% | 80 USB, RS232, RS485 with SCPI | 50 USB |
| Protection & features 10% | 60 over-voltage protection, over-current protection | 50 over-voltage protection, stored setups |
| Warranty 15% | 0 warranty not published, scored as none | 50 2-year warranty |
Specifications
| OWON OEL8511 | B&K Precision 1687B | |
|---|---|---|
| Output | ||
| Type | Electronic load | Power supply |
| Regulation | - | Switching |
| Channels | 1 | 1 |
| Channel ratings | 150 V/20 A, 200 W | 1-36 V/10 A |
| Max voltage | 150 V | 36 V |
| Max current | 20 A | 10 A |
| Rated power | 200 W | 360 W |
| Ripple and noise | - | 5 mVrms / 50 mVp-p |
| Dynamic mode | 5 kHz | - |
| Load modes | CC, CV, CR, CP | - |
| Precision | ||
| Setting resolution | 1 mV / 1 mA | - |
| Readback resolution | 1 mV / 0.1 mA | - |
| Control | ||
| PC interfaces | USB, RS232, RS485 | USB, analog remote |
| SCPI | Yes | - |
| Stored setups | - | 3 |
| Over-voltage protection | Yes | Yes |
| Over-current protection | Yes | - |
| Build | ||
| Weight | 9.3 lb | 5.2 lb |
| Warranty | - | 2 years |