Envco – Environmental Equipment

Designed for an Auckland Regional Council lakes thermocline program these buoys are proving popular with many clients.

Our design provides a low profile buoy for rapid deployments and payload changes. The design incorporates a dual seal waterproof instrument enclosure with ample room for dataloggers comms and batteries. The kit comes complete and ready to deploy with mounted solar cells, seals, antenna, and connectors.

The buoy is vandal resistant as it has no accessibility to the payload without a key and all external bolts are tamper-proof. The antenna is mounted internally and being hepta-band covers all global radio and cellular (legal) comms frequencies. You should check comms strength before deployment. The payload cover also has an inspection port. This allows access to a switch or observation of LEDs.

Seals include silicon o-ring and option grease seal. The grease seal is integral and only requires the addition of silicon grease. This is to prevent field situations where deployment could not be possible when the o-ring is damaged.

Our design has a membrane protected open vent. The microporous expanded polytetraflouroethylene (ePTFE) membrane continuously allows the free passage of gases and vapors, equalizing the pressure differential between the enclosure and ambient before it builds to the point that a seal is compromised. By allowing hydrogen gas to diffuse through the membrane vent, the concentration of hydrogen inside the case is kept below potentially explosive levels.

Material Specifications
Size - 930mm diameter x 300mm depth
Metal Hardware 304 or 316 Stainless
Plastic Hardware Welded Polyethylene
O-Ring Seal –Silicon
Mounting Points –304 or 316 Stainless Steel

Included Hardware
Connectors - Subcon 2, 3, and 4 pin
Internal Antenna - Taoglas Heptaband PCB
Solar Cell - 10 Watt Flat Panel, no glass (bolted and Sikaflex)
Lock - Stainless Steel, Keyed
Hinge - 316 Stainless
Reflective Films - 3M, heat sealed edges
Enclosure Vent – GOREVent
Enclosure Size – 295mm diameter, 210mm depth
Enclosure volume - 15 litres (approx)
Bolts – Tamperproof stainless steel

Ordering Information
EMMB304 Envco Designed 25kg payload 304 Stainless monitoring buoy, complete (no instruments)
EMMB316 Envco Designed 25kg payload 316 Stainless monitoring buoy, complete (no instruments)

Options
EWR Envco Designed Wear ring for subsurface cable guide
Custom designed mounting for metrological stations
PB150 Airmar GPS Marine Weather Sensor (SDI-12)
ProRadio SDI-12 radios
ProString Temp strings and Sensor strings

Colors may vary from photo. Lock position and material revision current