D & A Instruments

Campbell Scientific, Inc. has purchased D & A Instruments. Please submit all requests here .

Sediment Instruments for all Environments

Instruments OBS-3+ Suspended - solids and turbidity sensor more Measures turbidity and suspended solids Compact micro low-power probe Integral Voltage clamp and 4-20 mA current loop OBS-3A Suspended - solids, pressure, temperature, and salinity logger more No cable required, runs 1,500-8,000 hours on 3 “D” cells Measures sediment concentrations to 5,000 mg/ι & turbidity to 4,000 NTU with field-proven OBS® technology (U.S. Patent No. 4,841,157) Logs depth, wave height, wave period, temperature, and salinity Records 200,000 lines of data in FLASH Compact package – 76 mm (3”) by 362 mm (14.3”) Program setpoints & sampling times OBS-4 Micro-size turbidity sensor more Micro-size turbidity sensor Custom OEM packaging Low-power laser light source with automatic power control (APC) Choice of 650, 780, or 850 nm operating wave OBS-5+ Optical monitor for high - sediment cocntrations more Measures concentrations up to 200 g/l (specific gravity 1.12) Logs instrument depth, wave height, and period Records 200,000 scans of data in FLASH memory Runs as long as six months on three alkaline C cells RS-232 and RS-485 data links Compact package 380 mm (15”) by 60 mm (2.4”) Hydro-Wiper+ Mechanical wiper system more Highly effective in both marine and fresh water Simple to attach Embedded microprocessor for intelligent operation control High precision on-board clock for accurate wipe interval timing Fully self contained; no system integration required Rugged design for dependable reliability Field proven brush technology Simple wipe interval adjustment Very long deployment endurance Drive shaft slip mechanism prevents gearbox damage 30m operating depth as standard

Instruments

OBS-3+ Suspended - solids and turbidity sensor more

Measures turbidity and suspended solids Compact micro low-power probe Integral Voltage clamp and 4-20 mA current loop

Measures turbidity and suspended solids

Compact micro low-power probe

Integral Voltage clamp and 4-20 mA current loop

OBS-3A Suspended - solids, pressure, temperature, and salinity logger more

No cable required, runs 1,500-8,000 hours on 3 “D” cells Measures sediment concentrations to 5,000 mg/ι & turbidity to 4,000 NTU with field-proven OBS® technology (U.S. Patent No. 4,841,157) Logs depth, wave height, wave period, temperature, and salinity Records 200,000 lines of data in FLASH Compact package – 76 mm (3”) by 362 mm (14.3”) Program setpoints & sampling times

No cable required, runs 1,500-8,000 hours on 3 “D” cells

Measures sediment concentrations to 5,000 mg/ι & turbidity to 4,000 NTU with field-proven OBS® technology (U.S. Patent No. 4,841,157)

Logs depth, wave height, wave period, temperature, and salinity

Records 200,000 lines of data in FLASH

Compact package – 76 mm (3”) by 362 mm (14.3”)

Program setpoints & sampling times

OBS-4 Micro-size turbidity sensor more

Micro-size turbidity sensor Custom OEM packaging Low-power laser light source with automatic power control (APC) Choice of 650, 780, or 850 nm operating wave

Micro-size turbidity sensor

Custom OEM packaging

Low-power laser light source with automatic power control (APC)

Choice of 650, 780, or 850 nm operating wave

OBS-5+ Optical monitor for high - sediment cocntrations more

Measures concentrations up to 200 g/l (specific gravity 1.12) Logs instrument depth, wave height, and period Records 200,000 scans of data in FLASH memory Runs as long as six months on three alkaline C cells RS-232 and RS-485 data links Compact package 380 mm (15”) by 60 mm (2.4”)

Measures concentrations up to 200 g/l (specific gravity 1.12)

Logs instrument depth, wave height, and period

Records 200,000 scans of data in FLASH memory

Runs as long as six months on three alkaline C cells

RS-232 and RS-485 data links

Compact package 380 mm (15”) by 60 mm (2.4”)

Hydro-Wiper+ Mechanical wiper system more

Highly effective in both marine and fresh water Simple to attach Embedded microprocessor for intelligent operation control High precision on-board clock for accurate wipe interval timing Fully self contained; no system integration required Rugged design for dependable reliability Field proven brush technology Simple wipe interval adjustment Very long deployment endurance Drive shaft slip mechanism prevents gearbox damage 30m operating depth as standard

Highly effective in both marine and fresh water

Simple to attach

Embedded microprocessor for intelligent operation control

High precision on-board clock for accurate wipe interval timing

Fully self contained; no system integration required

Rugged design for dependable reliability

Field proven brush technology

Simple wipe interval adjustment

Very long deployment endurance

Drive shaft slip mechanism prevents gearbox damage

30m operating depth as standard

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