| Restocking Fee | No |
|---|---|
| Return shipping will be paid by | Seller |
| Returns Accepted | Returns Accepted |
| Item must be returned within | 30 Days |
| Refund will be given as | Money Back |
| Brand | OTC |
| Manufacturer Part Number | 5025 |
| UPC | 731413559846 |
| MPN | 5025 |
Check the listing for details. OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer. Condition: New. Listed at 111.49 USD. The 5025 refractometer is a portable, precision, optical instrument used for measuring the DEF concentration. When a liquid sample is placed on the prism, the light passing through it is bent. The more concentrated the liquid, the more the light will bend. It contains a reticle, or scale, that is enlarged through the eyepiece to measure this light; and the values on the scale have been established to evaluate the DEF condition. According to Adamson, simply place a small liquid DEF sample on the refractometer prism, look through the eyepiece, and read the scale, which has been specifically calibrated for DEF.