An electrofisher is a device that uses electrical currents to temporarily stun and collect aquatic species. It works by emitting an electrical pulse into the water, which stuns or immobilizes the fish, making it easier to collect them. Electrofishing is used as a research tool to estimate fish populations and their distributions, as well as a management tool to remove invasive species. The electrical pulse is typically delivered through electrodes that are positioned near the water's surface,

The WS750 is a stormwater sampler with 2 peristaltic pumps & 2 x 7 litre sample bottles (one for discrete sampling and a second to hold a composite or average sample). Includes delayed start-up and triggered start-up. Very easy to set up & use.

The Manta multiprobe from Eureka Environmental can have a choice of conductivity/TDS/Salinity, pH, Redox, Dissolved Oxygen, ammonia, Turbidity and chlorophyll sensors. Data display/collection can be via the Amphibian (PDA based) hand held display unit.

Flo-Probe velocity flow meter from Global Water Inc, simple, low cost, accurate (+/-0.03 m/s) with telescopic handle extendible 1.0-2.0m (model FP111) or 1.5-5.0m (model FP211)

Stainless steel propeller type flow meters (4 different types with both horizontal and vertical shafts) with hand held pulse counters, flow calculators, wading rod sets, etc

Electromagnetic portable flowmeters (velocity meter) from Marsh McBirney, accurate, rugged, never needs calibration, no maintenance (just cleaning)

Water Flow Logger FL16 from Global Water is mounted at V-notches, pipes, flumes and weirs to measure volumetric flow. It is based on a depth sensor, from which the water level is used to calculate flow. Simple, rugged, easy to use, accurate and reliable.

Open Channel Flowmeter by Global Water - Based on an accurate and stable pressure transducer, this unit displays instantaneous volumetric flow in engineering units and totalized flow. Alarm/control outputs and simple data logging is also available

The WS700 Wastewater or Composite sampler is used in many applications where a composite or average sample is required. It has one sample bottle of 20 liters. Sampling is via a peristaltic pump. Low cost and simple to operate.

Other models with various facilities are also available

The SP250 is a 3-roller 12v dc peristaltic pump with variable speed drive for purging and sampling work with backflush. Maximum head of 7m. Easy to maintain and clean. Features: backflush, waterproof casing, accurate dialable sample volumes.

The WL400 from Global water is a pressure transducer with nominal ranges 0-1m, 0-5m, 0-10m, 0-20m, 0-40m, 0-60m or 0-150m sensor ranges, accuracy 0.2% FS, 4-20mA output, 10-36v dc power, barometric pressure and temperature compensated

The WQ600 ORP/Redox transducer from Global Water has a range of -500 to +500 mv, accuracy 2% FS , temperature compensated, maximum depth 50m, 4-20mA output, 10-36v dc power. Ideal for SCADA/logger applications.

The WQ201 pH transducer from Global water has: range 0-14 pH units, temperature compensated, accuracy 2% FS, maximum depth 50m, 4-20mA output, 10-36v dc power. It is ideal for use in SCADA and logging systems.

Geokon originally invented the VWP in the 1980s. They are still leaders in the field today, offering standard VWP, VWP with internal logging, auto resonant, high temperature, multilevel and many others. The systems come with separate data loggers, hand held readout units for testing, system set-up and optional data logging. Piezometer pressure ranges are from 0-300 MPa (0-30 m water) to 0-20 MPa (2000 m water)