Steady low flow
Closed-loop control holds the setpoint within ±5 % from 50 to 500 mL/min, compensating for tube back-pressure as the sorbent loads.
Environmental sampling equipment
Soil Gas Sampling
Ripo builds the carbon-tube pumps that environmental consultants and laboratories rely on to draw soil gas through sorbent tubes — at a controlled low flow, with the sample volume recorded to the millilitre.
What it is
Purpose-built pumps for soil gas and soil vapour surveys
Soil gas sampling means pulling a measured volume of pore-space air from the ground through a tube packed with activated carbon or another sorbent, then sending that tube to a laboratory for analysis of volatile compounds — BTEX, chlorinated solvents, TPH and similar. The result is only as good as the pump: the flow has to stay steady and low, and the total volume has to be known.
Ripo’s pumps are engineered around exactly that job. Each unit holds its set flow across the whole run, doses to a target volume and stops itself, and logs the run so the field record matches the chain of custody. They are compact, field-serviceable, and shipped with a traceable calibration certificate.
- 2007 Founded in Denmark
- 20+ Years building sampling pumps
- 7 Engineers in-house
- 100+ Consulting & lab clients
Method
How a sampling run works
Four steps in the field. The pump handles the parts that have to be exact.
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Step 01
Install the probe
Drive or place the soil gas probe to the target depth and let the borehole equilibrate. Connect the probe line to the pump inlet.
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Step 02
Load the sorbent tube
Fit a 6 mm carbon, Tenax or silica-gel tube into the inline holder, arrow pointing toward the pump. Record the tube ID.
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Step 03
Set flow & volume
Dial in the flow rate (e.g. 200 mL/min) and the target volume (e.g. 2 L). Purge, then start. The pump stops at volume.
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Step 04
Log & despatch
Export the run log, cap the tube, and send it to the laboratory with the chain-of-custody form. Recharge over USB-C.
Why the pump matters
Built for a defensible sample
Everything here exists to make the number the lab reports trustworthy.
Stops at target volume
Set the litres you need. The pump integrates flow over time and shuts off automatically — no over-pull, no manual stopwatch.
On-board run log
Start/stop time, average flow, delivered volume, ambient temperature and battery state, exportable as CSV for the project file.
A full day in the field
14 hours of continuous sampling at 250 mL/min on one charge. USB-C in, hot-swappable battery pack available.
Standard tube fittings
Works with 6 mm OD sorbent tubes from the common suppliers — activated carbon, charcoal, Tenax TA, silica gel, multi-bed.
Calibrated & certified
Every unit ships with a flow calibration certificate traceable to a national standard. Annual re-calibration service available.
Data sheet
Technical specification
Representative figures for the current model. Final published values are confirmed on the data sheet.
| Flow range | 50 – 500 mL/min, adjustable in 5 mL/min steps |
|---|---|
| Flow accuracy | ±5 % of setpoint, actively regulated against back-pressure |
| Volume metering | Integrated; auto-stop at target volume, 0.1 – 20 L |
| Back-pressure capability | Up to 40 in. H₂O (≈ 100 mbar) at rated flow |
| Battery | Li-ion, 14 h at 250 mL/min; USB-C PD charging, ~3 h full |
| Data | Run log with CSV export; on-device screen; USB-C data |
| Tube compatibility | 6 mm OD sorbent tubes — carbon, charcoal, Tenax TA, silica gel, multi-bed |
| Inlet / connections | Luer-lock and 6 mm push-fit; PTFE-lined flow path |
| Operating temperature | −10 °C to +45 °C |
| Ingress protection | IP54; field-serviceable pump head |
| Weight / dimensions | 2.1 kg · 210 × 120 × 90 mm |
| Calibration | Traceable certificate supplied; recommended annual interval |
Where it's used
Applications
Contaminated land investigation
Delineating VOC and hydrocarbon plumes in soil pore gas across site investigation and remediation phases.
Vapour intrusion assessment
Sub-slab and near-building soil gas sampling to assess the risk of vapours migrating into occupied structures.
Landfill & ground gas monitoring
Spot sampling of methane, CO₂ and trace VOCs around landfill boundaries and on former filled ground.
Brownfield due diligence
Pre-acquisition and pre-development surveys where a quick, well-documented soil gas dataset informs the deal.
Remediation performance monitoring
Tracking soil vapour concentrations over time to confirm that SVE or bioremediation is working.
Indoor air & crawl-space screening
Low-flow sorbent-tube sampling of indoor and crawl-space air alongside the exterior soil gas programme.
Standards & methods
Works within the methods you already report to
The pump is method-agnostic hardware: you choose the sorbent and the analytical method, and the pump gives you the controlled flow and recorded volume those methods assume.
- ISO 16017-1 / -2 — sorbent tube sampling of VOCs, pumped and diffusive
- ASTM D7663 — active soil gas sampling
- US EPA vapour intrusion guidance (OSWER) workflows
- Miljøstyrelsen (Danish EPA) soil gas investigation guidance
- Chain-of-custody and field-record documentation built into the run log
In the box
Standard kit contents
- 01 Soil gas pump with regulated low-flow head
- 02 Li-ion battery + USB-C PD charger
- 03 Inline tube holder for 6 mm sorbent tubes
- 04 Tubing set — PTFE-lined, Luer and push-fit
- 05 Flow calibration certificate, unit-specific
- 06 Quick-start card + link to full user manual
- 07 Protective field case, foam-fitted
- 08 12-month warranty and support
Getting one
Buy outright, or rent for the project
Most consultancies buy a small fleet and add units as their soil gas workload grows. For a one-off investigation or a peak in fieldwork, weekly and monthly rental is available, calibration included, shipped across the EU. Tell us the number of teams and typical sampling days per month and we'll size it with you.
Existing customers
The customer portal
Logging in gives your team its calibration records and certificates, current and past user manuals, firmware updates, and one-click reordering of tubes, tubing and spares against your account.
That's set by your target compounds and the laboratory's method, not by the pump. Activated carbon and charcoal cover most petroleum and solvent work; Tenax TA and multi-bed tubes suit wider VOC screens. Any 6 mm OD tube fits the inline holder.
Follow the analytical method and the sorbent's safe sampling volume. A common starting point is 100–250 mL/min for 1–4 litres total. The pump auto-stops at the volume you set, so you can leave it running unattended.
Each unit ships with a traceable flow calibration certificate. We recommend annual re-calibration, or sooner if the field log shows the delivered flow drifting from setpoint. We run a return-to-base calibration service with a loaner option.
Yes. The same low-flow, volume-controlled sorbent-tube method applies to sub-slab ports, crawl spaces and indoor air. Only the probe and fittings change.
