You offer two types of DO sensor and two types of fluorometers. Why and what is the difference between them?

Brian Admin

When we can we try to offer sensors in different price and accuracy categories or for special purposes. In the case of the DO sensors we offer a Galvanic cell sensor and an Optode. The galvanic cell sensor is less expensive than the optode but requires more routine maintenance to keep it operating effectively. With regard to the fluorometers, our … Read More

You offer two types of depth gauges – how do I choose one over the other?

Brian Admin

Yes we offer two types, one is a strain gauge and the other is a quartz crystal. The strain gauge is what we recommend for most applications as it has an accuracy of 0.05% full scale accuracy, while the quartz sensor has an accuracy of 0.01% full scale. So depending on the accuracy of the depth you need the choice … Read More

When should I use a DO Optode sensor rather than a galvanic DO sensor (Oxyguard)?

Brian Admin

It depends on your application and budget. Both the galvanic cell sensor and the optode sensor are accurate instruments. The optode is more expensive than the galvanic cell sensor, but long term can be more stable, and does not require periodic refurbishment and recalibration.  The Oxyguard has a lower initial cost, but does require periodic refurbishment and recalibration by the … Read More

What is the difference between Turbidity and OBS and TSS?

Brian Admin

Sometimes there are different terms which mean the same thing. Turbidity is a quantity measured by optical back-scatter of light and OBS stands for Optical Back-Scatter. TSS or Total Suspended Solids is also a quantity measured using optical back scattering. Turbidity and TSS are essentially the same parameter. Although turbidity purports to measure approximately the same water quality property as … Read More