Showing all 8 results
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NivuFlow Gauging
Van Walt’s aim is to keep flow gauging simple. To do this we now offer a flow gauging service where we will travel to your site and carry out flow gauging in your stream or pipe on your behalf. Once our site visit is complete, we will issue a full report which will include:- Location photos
- A profile of the bed
- The level of each sampled segment
- The velocity profile over 10 sampled segments
- The flow rate
- The area, hydraulic radius and wetted perimeter
- PDF and .CSV results
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Package – YSI & Peristaltic Pump (Advanced)
Van Walt's most popular product combination for reliable, accurate results. An award winning YSI multiparameter meter combined with our versatile electronic peristaltic pump with advanced memory option. This reliable and universal electronic peristaltic pump can create a perfect vacuum for sampling and purging in shallow wells. This package is perfect for low flow sampling of groundwater and is available with optional auto shut off to assist compliance with the latest standards and directives when low flow sampling in monitoring wells. -
Package – YSI & Bladder Pump
Combining an award winning YSI multiparameter meter with a small, portable, very efficient pumping package that includes a built-in, high efficiency electrical compressor and optional auto shut off. The small electric compressor uses an external rechargeable lead acid battery and no air makes contact with the sample liquid. There is no sample cross-contamination because the stainless steel pumps use a replaceable bladder either in Teflon or PE for easy cleaning. The ideal low flow groundwater sampling package capable of pumping from depths of up to 60 metres. -
Package – PID & Oil Interface Meter
A useful package for anyone monitoring potentially hazardous wells and boreholes. Combining a robust handheld VOC monitor for the detection of volatile organic compounds and a standard Oil Interface Meter - 30 m with a 16mm probe for the accurate measurement of hydrocarbons as thin as 1.52 mm that produces an alarm when in contact with the product layer, a solid tone and green light alarm is activated on the reel. -
‘Safe on Site’ Package – PID & LEL Meter
Van Walt's 'Safe on Site' package with our robust handheld VOC meter that provides excellent detection for volatile organic compounds and has intuitive software features plus an accurate portable gas detector with audible and visual alarms which sound in the event of exposure to flammable gases, oxygen and a wide range of toxic gases onsite. Ideal for keeping you safe on petrol forecourts, landfill sites and other potentially hazardous environments. -
Package – YSI, Oil Interface Meter & Peristaltic Pump (Advanced)
A versatile system for sampling and purging in shallow wells using an advanced Peristaltic Pump that creates a perfect vacuum, a handheld YSI multiparameter water quality test meter, a standard Oil Interface Meter - 30 m with a 16mm probe for the accurate measurement of hydrocarbons as thin as 1.52 mm in wells as small as 19mm in diameter and, when used with an in-line filter and flow-through cell creates a sophisticated low flow sampling system. -
Package – YSI, Oil Interface Meter & Bladder Pump
A serious low flow groundwater sampling solution for depths up to 60 metres including a handheld YSI multiparameter water quality test meter, a standard Oil Interface Meter - 30 m with a 16mm probe for the accurate measurement of hydrocarbons as thin as 1.52 mm in wells as small as 19mm in diameter and small, portable, very efficient bladder pump with compressor. -
Package – PID, LEL Meter & Oil Interface Meter
The ultimate 'Safe on Site' package with a handheld volatile organic compound (VOC) meter; an accurate portable gas detector with audible and visual alarms which sound in the event of exposure to flammable gases, oxygen and a wide range of toxic gases onsite and a standard Oil Interface Meter - 30 m with a 16mm probe for the accurate measurement of hydrocarbons as thin as 1.52 mm in wells as small as 19mm in diameter.