The Urban Runoff Passive Stormwater (URPS) sampler range is designed for early event-based sampling in New Zealand stormwater sumps.
Three separate models cover a range of common sump types and sizes, with custom device builds available.
Easy to use, clean and REUSE.
URPS
Passive stormwater samplers
U·R·P·S
Deploy before rainfall, retrieve after the event.
Deploy before rainfall, retrieve after the event.
Passive stormwater samplers
The Urban Runoff Passive Stormwater (URPS) sampler range is designed for early event-based sampling in most.
New Zealand stormwater sumps. Three separate models cover a range of common sump types and sizes, with custom device builds available.
Easy to use, clean and REUSE.
Plan sampling before the rain
Stormwater Innovation Forum Award
Stormwater Innovation Forum Award
Winner - 2026
The URPS sampler range allows compatible stormwater sumps to be set up for passive sampling ahead of forecast rainfall.
Developed by Earth Measure from field experience, the design uses a reusable frame and removable sample bottles, with no power supply or pump.
Luc le Roux, Earth Measure, was recognised for work on passive, scalable stormwater sampling using URPS.
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Luc le Roux, Earth Measure’s founder, was recognised for work on passive, scalable stormwater sampling using URPS samplers.
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Luc le Roux, Earth Measure’s founder, was recognised for work on passive, scalable stormwater sampling using URPS samplers.
Winner - 2026
Luc le Roux, Earth Measure, was recognised for work on passive, scalable stormwater sampling using URPS.
Designed for repeated field use
Designed for repeated field use
No moving parts
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Sample capture uses hydraulic head and a designed overflow arrangement, without moving valves or triggers. Minimal design makes understanding and cleaning your URPS easier.
A reusable frame and removable bottles allow the equipment to be cleaned, reset and deployed again. Devices can be built to fit most local laboratory plastic bottle types.
The Universal (U) model adjusts across compatible sump sizes, giving you more flexibility than a single fixed footprint. Certain sumps need custom fit solutions - this is where the Standard (S) model excels as the foundation for bespoke builds.
Sample capture uses hydraulic head and a designed overflow arrangement, without moving valves or triggers. Minimal design makes understanding and cleaning your URPS easier.
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The Universal (U) model adjusts across compatible sump sizes, giving you more flexibility than a single fixed footprint. Certain sumps need custom fit solutions or a widescale approach for a large catchment - like the Standard (S) model.
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Adjustable models and custom fits
Built for reuse
Built for reuse
Adjustable & custom fits
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A reusable frame and removable bottles allow the equipment to be cleaned, reset and deployed again. Devices can be built to fit most local laboratory plastic bottle types.
No moving parts
Set up. Capture. Retrieve.
Set up. Capture. Retrieve.
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Deploy before rainfall
Confirm the fit and bottle configuration, then position the sampler ahead of the forecast event.
Let hydraulics do the work
Runoff enters the catch tray and fills the bottles. At the design fill level, hydraulic head limits further inflow while excess runoff leaves through the tray’s overflow points.
Drain the catch tray through the fitted bung before removing the sample bottles. Follow your sampling protocol and laboratory’s handling requirements, then clean reusable components for the next deployment.
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Retrieve and reset
Confirm the fit and bottle configuration, then position the sampler ahead of the forecast event.
Drain the catch tray through the fitted bung before removing the sample bottles. Follow your sampling protocol and laboratory’s handling requirements, then clean reusable components for the next deployment.
Runoff enters the catch tray and fills the bottles. At the design fill level, hydraulic head limits further inflow while excess runoff leaves through the tray’s overflow points.
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Retrieve and reset
Deploy before rainfall
Let hydraulics do the work
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Passive, event-based collection.
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Two removable bottles; 0.5 L or 1 L bottle configurations.
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Aluminium and stainless-steel frame with polymer and rubber components.
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An adjustable choice for programmes covering different compatible sump sizes. Particularly useful when redeploying equipment between sites. We confirm the intended range of openings and the clearance needed for your selected bottles before supply.
An adjustable frame for a range of compatible sump sizes. Choose the U model when flexibility across different sump openings is useful.
Fit is checked against the intended range of sump layouts, openings and available clearances.
A fixed-frame option for compatible rectangular stormwater sumps.
Confirm the opening dimensions and available clearance before supply.
Find the right fit
We help confirm the model, sump fit and bottle configuration before supply.
URPS U - Universal
URPS S - Standard
URPS C - Compact
Find the right fit
URPS U - Universal
A smaller-format adjustable frame for compatible small square stormwater sumps.
Confirm the smaller opening, sump layout and available clearance before supply.
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Passive, event-based collection.
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Two removable bottles; 0.5 L or 1 L bottle configurations.
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Aluminium frame with polymer and rubber components.
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A fixed-frame option for repeat sampling in compatible rectangular sumps. Suits deployments where the opening dimensions are known and frame adjustment is unnecessary. Fit and bottle clearance are confirmed before supply.
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Passive, event-based collection.
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Two removable bottles; 0.5 L or 1 L bottle configurations.
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Aluminium and/or stainless-steel frame with polymer and rubber components.
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A smaller, adjustable option for compatible square sumps where space is limited. We check the opening dimensions, internal layout and bottle clearance to confirm whether Compact suits the installation.
An adjustable frame for a range of compatible sump sizes. Choose the U model when flexibility across different sump openings is useful.
Fit is checked against the intended range of sump layouts, openings and available clearances.
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Passive, event-based collection.
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Two removable bottles; 0.5 L or 1 L bottle configurations.
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Aluminium and/or stainless-steel frame with polymer and rubber components.
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Compatible stormwater sumps with suitable clearance and access.
URPS S - Standard
A fixed-frame option for compatible rectangular stormwater sumps.
Confirm the opening dimensions and available clearance before supply.
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Passive, event-based collection.
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Two removable bottles; 0.5 L or 1 L bottle configurations.
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Aluminium frame with polymer and rubber components.
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Compatible stormwater sumps with suitable clearance and access.
URPS C - Compact
A smaller-format adjustable frame for compatible small square stormwater sumps.
Confirm the smaller opening, sump layout and available clearance before supply.
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Passive, event-based collection.
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Two removable bottles; 0.5 L or 1 L bottle configurations.
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Aluminium and stainless-steel frame with polymer and rubber components.
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Compatible stormwater sumps with suitable clearance and access.
We help confirm the model, sump fit and bottle configuration before supply.
Device frame
Device Height
(0.5 & 1L bottles)
Composition
Fixed
Standard
275 mm - 410 mm
720 g
Specifications & Fit
Universal vs Standard vs Compact
170 mm
240 mm
340 mm
Standard
Compact
Custom Fit
Compact
440 mm
140 mm
260 mm
360 mm
1,000 g
420 - 480 mm
300 - 360 mm*
Adjustable
Custom Fit
Device width
(frame)
Device length
(frame)
Sump requirements
(min. inner frame width)
Unit length
(frame)
445 mm
360 mm*
Universal
Device weight
(Approx.)
Compatible Sump sizes
(inner frame width)
Adjustable
280 mm - 440 mm
Unit width
(frame)
Height
(with 1L bottles attached)
Height
(with 0.5L bottles attached)
140 mm
355 mm
260 mm
140 mm*
415 mm*
320 mm*
Built to suit
(confirmed at fit-check)
170 mm
245 mm
335 mm
Sampling volume
(1L vs 0.5L combo)
1-2 L
Aluminium & stainless-steel frame
+ polymer / rubber fittings
Brand compatibility
(Sump grate frame)
Weight
(Approx.)
Humes,
Hynds
600 g
500 g*
300 - 360 mm
Composition
300 - 480 mm
420 - 480 mm
Aluminium frame + polymer/rubber
1,050 g
*Compact is designed for tighter square sumps. Compact specifications are preliminary, awaiting final prototype verification and quality check certification. All orders are confirmed via fit-check before manufacture.
Aluminium &/or stainless-steel frame
+ polymer / rubber fittings
Aluminium frame
+ polymer / rubber fittings
Built to
specification
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Send a photo of the sump, its opening dimensions and the available clearance. We help check which model suits the layout before you order. The U model adjusts within its compatible fit range.
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We confirm the frame, capture components, bottle configuration and any optional fittings in your quote. Standard bottle options are 0.5 L and 1 L. Bottle materials and preparation need to suit your laboratory’s analytical requirements.
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The frame and removable sampling components can be cleaned between events. Cleaning and decontamination should follow your sampling protocol and laboratory’s requirements for the contaminants being measured.
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The sampling method must suit your monitoring objectives and any consent conditions. URPS provides passive, event-based collection. We can help assess the setup, bottle requirements and handling procedure for your programme.
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Send a photo of the sump, its opening dimensions and the available clearance. We help check which model suits the layout before you order. The U model adjusts within its compatible fit range.
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We confirm the frame, capture components, bottle configuration and any optional fittings in your quote. Standard bottle options are 0.5 L and 1 L. Bottle materials and preparation need to suit your laboratory’s analytical requirements.
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The frame and removable sampling components can be cleaned between events. Cleaning and decontamination should follow your sampling protocol and laboratory’s requirements for the contaminants being measured.
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The sampling method must suit your monitoring objectives and any consent conditions. URPS provides passive, event-based collection. We can help assess the setup, bottle requirements and handling procedure for your programme.
Frequently asked questions
Frequently asked questions
Let’s confirm your setup
Tell us what you need, where the site is and any key deadlines.
We’ll discuss an appropriate scope and next steps.
Tell us about your sump, sampling requirements and the number of units you need.
We’ll confirm fit, bottle configuration, supply inclusions and delivery arrangements.
Let’s confirm your setup
Discuss your project
Tell us about your sump, sampling requirements and the number of units you need. We’ll confirm fit, bottle configuration, supply inclusions and delivery arrangements.
Need help with the wider programme? Earth Measure also provides monitoring design, sampling coordination and technical reporting.
Need help with the wider programme? Earth Measure also provides monitoring design, sampling coordination and technical reporting.