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HydroTech - Model LDM -Long-Term Deployment Module
LDM `Long-term Deployment Module” (Antifouling); The newly patented anti-fouling module from HydroTech. (Patent number 7,437,248.). The most powerful anti-fouling (micro-fouling and macro-fouling) system in the market - `no gimmicks`. No copper - no questionable chemicals. Compatible with all existing multiprobes from all manufacturers. Continuous deployment for one to three months in the worst conditions. Guarantees stable and accurate measurements for all sensors. Computer GUI will provide you with easy setup and maximum control flexibility. Keeps sensors protected at all times during deployment. SDI-12 ready. Designed with all USGS needs in mind. Can be used as an online underwater sampler with In-Situ measurement validated data. With the LDM, you can now deploy a multiprobes in a discharge area where bubbling water would normally affect the sensors operation.
Here is what you should expect from the LDM: Two multiprobes were deployed side by side in an active water body for 6 weeks . One of them was equipped with the HydroTech LDM but not the other. See graphed data below.
Optical DO: The LDM equipped multiprobe DO measurements are stable and accurate during the whole 6 weeks while the DO measurements from the other multiprobe without LDM are erratic and drift out of the calibration criteria just after 3 weeks.
pH : The LDM equipped multiprobe pH measurements are stable and accurate during the whole 6 weeks while the pH measurements from the other multiprobe without LDM are erratic and drift out of the calibration criteria just after 3 weeks.
Conductivity: After 2.5 weeks of deployments fouling has already affected the conductivity measurements on the unit without LDM. While the LDM equipped multiprobe is still collecting stable and more accurate measurements.
Temperature: The LDM equipped multiprobe shows less sporadic temperature measurements. Sporadic temperature measurement affects data from all other sensors since they`re temperature compensated.
- Outer diameter: 4.5”/11.43 cm
- Length without guard: 14”/35.56 cm
- Weight: 7.4 lbs/3.35 kg (typical)
- Computer Interface: RS-232 and SDI-12
- Operating Temperature: 1 to 50° C
- Maximum Depth: 25 feet / 7.62 m
- Minimum water depth 2 feet
- Can be deployed to 20 degree angle from ground surface.
- Maximum water depth 25 feet ( 7.62 m )