Environmental & Gas Monitoring Instruments
Testo Forty-five years of environmental and gas monitoring delivered with audit-ready evidence.
Audit-ready evidence shipped alongside every instrument.
- ISO/IEC 17025 traceability workflow
- Ex ia IIC T4 Ga, Zone 0 guidance
- 0-100 %LEL application review
Applications from the seed list
Guided monitoring choices for sites where evidence matters
Utility & District Metering
Indoor Air Quality
Environmental Compliance
Core catalog paths
Start with the instrument family, then narrow by range, approval, and traceability
Environmental & Gas Monitoring Instruments
Portable and fixed monitoring for LEL, oxygen, toxic gases, ambient stations, and stack analysis.
0-100 %LELT90 < 15 sATEX/IECEx
Test & Measurement Instruments
Field tools for HVAC, electrical, temperature, humidity, thermal imaging, and routine troubleshooting.
Digital loggingThermal imagingNIST traceable
Process Instrumentation
Pressure, flow, level, and temperature measurement for utilities, process skids, and plant MRO teams.
4-20 mAHARTIP67
Sensors & Transmitters
Sensor and signal paths for condition checks, process indication, and installation-ready diagnostics.
IO-LinkM12Signal conversionBuyer guidance
Teams use Testo when the quote must survive engineering review
Testo helped us separate the gas detector list by Zone 0 and Zone 1 needs before procurement released the RFQ.
HSE LeadChemical processing site
The calibration documents arrived with the instruments, and our QA group could trace the chain without extra calls.
Quality ManagerDistrict utility operator
The application notes made it easier to compare thermal, humidity, and differential pressure tools for HVAC commissioning.
Commissioning EngineerBuilding systems integrator
< 8 s settlingTypical response
48 hTypical calibration turnaround
13 sitesAccredited calibration scope
19 yrsField-proven service
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