Name	Description	Category
Testo 6744 (0555 6744) Dew Point Transmitter with display 1/2 NPT	Reliable measurement of trace humidity User-friendly operation with display and control buttons Calculation of the most important trace humidity variables, also ppm Protocolled fine adjustment at -40 °C tpd 4 to 20 mA in two-wire technology Plastic, polyacrylamide housing material Ambient temperature: -20 to 70 degree C Storage temperature: -40 to 80 degree C Protection class: IP 65 Resolution: 12 bit Accuracy: +/- 40 microA	Transmitters
Testo 6743 (0555 6743) Dew Point Transmitter with display G1/2	Highest reliability Calculation of the most important trace humidity variables Adjustment report Convenient operation Analog output 4 to 20 mA, 2-wire technology	Transmitters
Testo 6742 (0555 6742) Dew Point Transmitter 1/2 NPT	Highest reliability Calculation of the most important trace humidity variables Adjustment report Convenient operation Analog output 4 to 20 mA, 2-wire technology	Transmitters
Testo 6741 (0555 6741) Plastic Polymer Dewpoint Transmitter G1/2	Highest reliability Calculation of the most important trace humidity variables Adjustment report Convenient operation Analog output 4 to 20 mA, 2-wire technology Ambient temperature: -20 to 70 ° C Storage temperature: -40 to 80 ° C Protection class: IP 65 Resolution: 12 bit Accuracy: +/- 40 microA Analog output 4 to 20 mA (2-wire technology)	Transmitters
Testo 6721 (0555 6721) Plastic Pressure Dewpoint Guard	Plastic pressure dewpoint guard Ideal for compressed air cooling driers Avoid moisture damage by monitoring the cooling drier Testo humidity sensor (with special trace humidity adjustment) and NTC temperature sensor Ambient temperature: 0 to 50 ° C Storage temperature: -40 to 70 ° C Measurement range/pressure dewpoint: -30 to 30 ° C Process connection: G1/2 thread Plastic PAA GF30 housing material Power supply: 24 VAC/VDC (20 to 30 VAC/VDC max), power consumption 50 mA	Transmitters
Testo 6681 (0555 6681) Industrial Humidity Transmitter	The Highest accuracy up to ±1.0 % RH First humidity transmitter with Profibus-DP interface Self-monitoring and early warning guarantee high system availability Optimum adjustment concept thanks to adjustment of the entire signal chain incl. analog adjustment P2A software for parameterization, adjustment and analysis saves time and costs in commissioning and maintenance Calculation and presentation of all relevant humidity parameters	Transmitters
Testo 6651 (0555 6651) Humidity Transmitter for Critical Climate	The Highest accuracy up to ±1.0 % RH First humidity transmitter with Profibus-DP interface Self-monitoring and early warning guarantee high system availability Optimum adjustment concept thanks to adjustment of the entire signal chain incl. analog adjustment P2A software for parameterization, adjustment and analysis saves time and costs in commissioning and maintenance	Transmitters
Testo 6444 (0555 6444) DN50 Compressed Air Flow Transmitter	Leakage detection, compressed air consumption meaurement Consumption cost allocation Peakload management Measuring range: 2.3 to 700 Nm³/h Pipe diameter: DN 50 (for 2" pipes) Weight: 3.8 kg Max. display value norm volume flow: 840 Nm³/h Min./max. monitoring Control of consumption-dependent maintenance strategies Automatic, exact compressed air dosage	Transmitters