The Three or Free guarantee is simple, so there isn't much fine print. We will inspect, calibrate, and ship your qualifying instruments back to you within three weeks of receiving them. If we don't, the calibration is free.

There are some situations that aren't covered under the guarantee, but we think you'll see they follow common sense. The guarantee does not apply to instruments requiring repair, instruments with a depth rating greater than 2,000m, or non-RBR sensors that need to be sent to the original manufacturer for calibration. We guarantee up to a total of 15 channels of calibration in a single shipment.

Our goal is to get you back in the water as quickly as possible, no matter what you need calibrated or repaired. If your instruments don't qualify, we will provide you with an expected completion date within two business days after receiving your shipment.

It's that simple.