Quick take
Choosing a rotary encoder for a sensor, motion-control, or machine-safety setup means balancing how many pulses you need per revolution, what kind of output your controller expects, and how much you want to spend. The four encoders in this comparison cover a wide price spread and different levels of technical detail. At the low end, the Oak / Grigsby gives you a lot of specification for the price. At the top end, the HEIDENHAIN offers a distinct model identity. In between, the OMRON provides a flexible DC supply range, while the HONTKO supplies a model from HONTKO in the upper-middle price band. If you know your target pulse count, the two lower-priced products make that easy to see. If you're choosing by model family, the HONTKO and HEIDENHAIN give you distinct part numbers.
Listed price comparison
| Product | Listed price | Price bar | Key details |
|---|---|---|---|
| New Heidenhain 589614-1X Incremental Rotary Encoder ERN 180 3600 03S12-03 K Unit | USD 425.00 | Incremental, new | |
| New In Box HONTKO HTR-HB-8-600-2-PP Rotary Encoder | USD 200.48 | HTR-HB-8-600-2-PP | |
| New OMRON E6B2-CWZ6C Rotary Encoder 500P/R 5-24VDC | USD 68.90 | 500 P/R, 5-24VDC, new | |
| Oak / Grigsby Rotary Encoder - 128 Pulse/Rev - 91Q128 - 2 CH Full Quadrature | USD 16.95 | 128 pulse/rev, 2 CH quadrature, new |
Decision matrix
Which one fits which scenario?
- Need the lowest listed price and the most transparent specs? The Oak / Grigsby is the clearest pick, with a shaft actuator and a full set of stated technical details.
- Want a higher pulse count and a stable DC supply? The OMRON steps up.
- Looking for a new-in-box model from HONTKO? The HTR-HB-8-600-2-PP is the one.
- Want a German-sourced encoder at the top of the budget? The HEIDENHAIN ERN 180 is the target.
Product notes
Oak / Grigsby Rotary Encoder - 128 Pulse/Rev - 91Q128 - 2 CH Full Quadrature
At the lowest listed price in this set, the Oak/Grigsby gives you a shaft-actuated optical encoder with 128 pulses per revolution and 2-channel full quadrature output. The description also specifies 512 total changes of state per revolution and TTL-compatible 5V operation. You get a 4-inch cable with bare wire ends and included mounting hardware. The trade-off is the termination: bare leads mean you'll handle the connection yourself, and the fixed 5V supply narrows the operating range compared to the OMRON's broader voltage envelope. This is a component-level choice for someone who wants to see exactly how the encoder is wired and evaluated. The price makes it an easy first option for breadboard prototypes or replacement duties where a 5V logic encoder fits.
New OMRON E6B2-CWZ6C Rotary Encoder 500P/R 5-24VDC
The OMRON E6B2-CWZ6C delivers 500 pulses per revolution and runs on a 5-24V DC supply, which gives you a higher resolution and a wider voltage band than the Oak/Grigsby. The product title includes the new condition and the E6B2-CWZ6C model. The main drawback is the higher price: it costs more than the Oak/Grigsby, so if you only need 128 pulses, you can save money with the lower-priced option. If you require the word 'quadrature' in writing, the Oak/Grigsby is the product that states it explicitly. The OMRON's voltage flexibility is its strongest argument for apps that don't have a clean 5V rail.
New In Box HONTKO HTR-HB-8-600-2-PP Rotary Encoder
The HONTKO is a new-in-box rotary encoder with the model number HTR-HB-8-600-2-PP. It occupies the upper-middle price band, and for someone who already knows this HONTKO family, the model identifier and new-in-box condition may be all you need. The price, however, is a big step above the OMRON, so if you're not yet committed to this model, the OMRON gives you more stated resolution per dollar. The HONTKO may be attractive when you need a specific replacement part and want the assurance of a new unit in the box. If you already know the HTR-HB-8-600-2-PP fits, the new-in-box condition removes the used-part guesswork.
New Heidenhain 589614-1X Incremental Rotary Encoder ERN 180 3600 03S12-03 K Unit
This HEIDENHAIN stands out as the only encoder here that explicitly uses the word 'incremental' in its title and lists a country of origin: Germany. The ERN 180 series and MPN 589614-1X provide precise model-level identification. The limitation is the $425.00 price, which is the highest in this comparison by a substantial margin-actually more than the other three listed prices combined. This is a buy for someone who has already determined that the ERN 180 form factor fits the application and wants the incremental output and German origin in writing. For a shopper comparing on price alone, the Oak/Grigsby and OMRON have much lower listed prices.
Final recommendation
Choose the Oak / Grigsby if price is your first concern. Choose the OMRON if its specifications match your application requirements. Choose the HONTKO if the HONTKO model is the one you're targeting. Choose the HEIDENHAIN if the HEIDENHAIN model aligns with your project needs.
Bottom line
The right pick depends on how much resolution you need and whether you already have a specific model family in mind. The Oak/Grigsby gives you the most wiring detail for the least money, while the OMRON brings a mid-priced pulse-count boost. The HONTKO and HEIDENHAIN are stronger fits when you already know the model family.
