What comes around...

keeps your process sound.

Introducing Vaisala Circular – a recalibration and reuse service that looks after your probes, your process and the planet.
Probe swapping

Precision never ends. It just starts over.

Vaisala Circular takes what works in your measurement monitoring – and keeps it working, again and again. By recalibrating and reusing your high-quality probes in our world-class laboratories, Circular ensures they stay as precise as the day they were built. 

This minimizes the risk of downtime, maintains accurate measurements, and cuts unnecessary waste. It’s a smarter way to protect performance, control costs, and support sustainability. Things going in circles never looked this good.

Get to know Circular

It all comes back to sustainability. And downtime.

And quite a few other things.

Minimized downtime

Always have freshly calibrated probes ready — no surprises.

Minimized waste

Reuse and recalibration extend probe life. A sustainable solution for your probes, process and the planet.

Always accurate

Calibration of all key parameters by the same experts who developed the probes. We’re on first name basis with your measurement devices.

Probe pool management

Vaisala stores and manages your dedicated probe pool: tested, calibrated, and ready when you need it.

Cost-effective and predictable

Keeps performance high and budgets clear, with an agreement-based service that makes planning simple.

Digital confidence

Each probe comes with a traceable calibration certificate and clear service reports.

Quality you can trust

Unmatched service quality and extended probe life. Up to 10 years or more.

World class service competence

The best people to look after measurement equipment are the ones who built them. Vaisala Services help keep your devices performing at their best.

Vaisala Circular is an agreement-based service including

  • Customer-specific probe pool
  • Tailored calibration service
  • Probe storage

Our calibration is more than just calibration. It includes:

  • Functional testing
  • Filter replacement if needed
  • As-Left calibration for pool probes and calibration certificate
  • Optional as-Found calibration for returned probes with a certificate
  • Service report 

Why it matters

Sustainability

Businesses face growing pressure to reduce waste and extend product life cycles: Taking every measure for the planet.

Cost-efficiency

In times of tighter budgets, predictable costs and smart reuse help maintain high performance without overspending.

Operational confidence

Stable processes, minimal downtime, and trusted measurement data are critical when production must stay resilient.

Vaisala Circular in practice

How it works

Validation icon, documents with check mark

1. Sign up

Start with a Vaisala Circular agreement. Tailor service details according to your needs.

Icon for probe swapping

2. Your private probe pool is ready

Vaisala maintains a dedicated, freshly calibrated probe pool for you.

Remote and digital services icon

3. Order your  probes easily

Order freshly calibrated probes online when it’s time to calibrate.

Icon for accredited calibration

4. Keep it turning

Swap new ones in and send the used ones back to Vaisala Service Center for recalibration. 

Vaisala Circular is available for the following probes product families:

  • humidity and temperature HMP60 and HMP110 series, including HMP110/T, HMP115/T, HMP113, and TMP115
  • humidity and temperature HMPx series, including HMP1, HMP3, HMP4, HMP5, HMP7, HMP8 and HMP9 probes
  • dew point and temperature DMPx series: including DMP1, DMP5, DMP6, DMP7 and DMP8 probes
  • carbon dioxide GMP250 series, including GMP251 and GMP252 probes
  • hydrogen peroxide, relative humidity, and temperature HPP270 series, including HPP271 and HPP272 probes

Vaisala Circular HMP5 probe
Vaisala Circular HMP110 probe
Vaisala Circular HMP113 probe
Vaisala Circular GMP251 probe
Vaisala Circular HPP271 probe
Marko Andersson

Get into the loop – join the Circular webinar

Vaisala Circular webinar by Marko Andersson, Service product manager, on November 11.

What comes around... keeps your process sound.

Join our upcoming webinar with Marko Andersson to see how the service works in practice — and how it keeps your probes, your process, and your sustainability goals moving forward.

The webinar will be held in English. Sign up and we will share the recording later if you cannot attend the live webinar.

Get in touch

Ready to take Vaisala Circular for a spin?

E-mail Facebook Twitter LinkedIn