testo 535 - CO2 meter

Order-Nr.  0560 5350

  • Quick and accurate CO2 measurements

  • Long-term measurements using max and average values

  • Long-term stable, maintenance-free infrared sensor

  • Optional testo turbo printer for print outs on site

The testo 535 CO2 meter comes with a permanently attached sensor and is designed specifically for monitoring and optimising the ambient air.

ZAR 8 750.50
excl. VAT

Product Description

The average European spends about 90 percent of their time in closed rooms. It is no small wonder then that the room climate often has a considerable effect on the way we feel and also on our health and our wellbeing. There’s a massive difference if the air – in an office for example – is fresh and invigorating or whether it’s heavy and stale. Stale and heavy air causes fatigue and tiredness as well as considerable discomfort. It can also lead to lack of concentration and actually have a detrimental effect on your health. The testo 535 CO2 meter is designed to measure the CO2 concentration in the ambient air because stale air has a much higher CO2 concentration than fresh air.

Areas of application and benefits of the testo 535 CO2 meter

The testo 535 CO2 meter is ideal for monitoring and optimising the room climate, i.e. in offices. It can also be used to check if existing air conditioning and ventilation systems are providing the relevant rooms with enough fresh air.

The high-precision, long-term stable, 2-channel infrared sensor measures the CO2 concentration in the ambient air. Because the 2-channel infrared sensor is maintenance-free, it can also be used to carry out long-term measurements. The readings from such measurements can be analysed using the minimum, maximum and average values. All these values can be displayed at the touch of a key.

The optional testo turbo printer can provide you with measuring data print outs that include both the time and date while you are still on site. And the optional TopSafe protective cover protects your meter against impact and dirt and water ingress.


Delivery Scope

testo 535 CO2 meter with permanently attached sensor, calibration certificate, batteries.

Ambient CO₂

Measuring range

0 to 9999 ppm

0 to 0.999 Vol.%


0 to 5000 ppm: ±(75 ppm + 3 % of mv)

5001 to 9999 ppm: ±(150 ppm + 5 % of mv)


1 ppm

0.001 Vol.%

General technical data


190 x 57 x 42 mm

Operating temperature

0 to +50 °C



Measuring medium


Auto-off instrument

10 min

Battery type

9V block battery

Battery life

6 h

Display type


Display size

2 lines

Storage temperature

-20 to +70 °C


300 g

Additional accessories and Spare parts

9V rech. battery for instrument

Order Number: 0515 0025

ZAR 244.20
excl. VAT
Recharger for 9V rechargeable battery

Order Number: 0554 0025

ZAR 223.85
excl. VAT


Transport and Protection


Order Number: 0516 0191

ZAR 651.20
excl. VAT