Transmitters / Stationary Products, Testo

0555 6742 Dew Point Transmitter (1/2 NPT) by Testo

The testo 6740 was especilally developed for trace humidity measurement in compressed or dry air (e. g. granulate dryers). Thanks to a special adjustment, optimum accuracy in the trace humidity range has been achieved. The result of the development of the testo 6740 is a measuring range of -45 °C_td to +30 °C_td and excellent accuracy.

For the display of the relevant trace humidity parameters, a freely scalable analog output is available, optionally with a switch contact plug for MAX monitoring. In addition to this, the testo 6740 stands out thanks to its compact and userfriendly design, such as the rotatability of the housing by 350° for the optimum positioning of the display.

• Measurement of dewpoints in the range from -45 °C_td to +30 °C
• Testo polymer humidity sensor with high accuracy and longterm stability
• Convenient operation via the display menu
• Analog output 4 to 20 mA (2-wire) and optional alarm plug with 2 integrated switch outputs
• Compact design with rotatable housing by 350° for optimum positioning of display
• Display with operating menu (optional)
• Trace humidity adjustment without reference measuring instrument possible on site with accessory (2-point adjustment device)

0699 6446/16 6446 Compressed Air Meter by Testo

The compressed air counters testo 6441 to testo 6444 are designed for the measurement, monitoring and recording of compressed air consumption, and therefore also for the determination of leakages in compressed air systems, consumption-based allocation of costs and the implementation of peak load management. The compressed air counters testo 6441 to testo 6444 record norm volume flow according to the calorimetric principle, which means the measurement procedure is independent of the process pressure and does not cause a permanent pressure drop.

The version testo 6447 offers everything the testo 6446 provides, in addition the removal of the probe under pressure is possible (patented screw fitting). The larger nominal values refer especially to important compressed air pipelines, often the main supply line after preparation.

• Measurement of norm volume flow in the measuring range 6.7 to 27500 m³/h (DN65 to DN350 or 21/2"-10")
• Exchangeable fitting: Probe removal under pressure possible (testo 6447 only)
• Material selectable between galvanized steel and stainless steel
• Highest flexibility thanks to different signal outputs: Analog output 4 to 20 mA (4-wire), Pulse output, 2 switch outputs (parameterizable: consumption or volume flow-dependent, opener, closer, hysteresis, window)
• Built-in totalizer, even without additional analysis unit
• Operating menu with LED display
• Cleanable sensor

0555 6743 Dew Point Transmitter (with display; G1/2) by Testo

The testo 6740 was especilally developed for trace humidity measurement in compressed or dry air (e. g. granulate dryers). Thanks to a special adjustment, optimum accuracy in the trace humidity range has been achieved. The result of the development of the testo 6740 is a measuring range of -45 °C_td to +30 °C_td and excellent accuracy.

For the display of the relevant trace humidity parameters, a freely scalable analog output is available, optionally with a switch contact plug for MAX monitoring. In addition to this, the testo 6740 stands out thanks to its compact and userfriendly design, such as the rotatability of the housing by 350° for the optimum positioning of the display.

• Measurement of dewpoints in the range from -45 °C_td to +30 °C
• Testo polymer humidity sensor with high accuracy and longterm stability
• Convenient operation via the display menu
• Analog output 4 to 20 mA (2-wire) and optional alarm plug with 2 integrated switch outputs
• Compact design with rotatable housing by 350° for optimum positioning of display
• Display with operating menu (optional)
• Trace humidity adjustment without reference measuring instrument possible on site with accessory (2-point adjustment device)

0699 6447/11 6447 Compressed Air Meter by Testo

The compressed air counters testo 6441 to testo 6444 are designed for the measurement, monitoring and recording of compressed air consumption, and therefore also for the determination of leakages in compressed air systems, consumption-based allocation of costs and the implementation of peak load management. The compressed air counters testo 6441 to testo 6444 record norm volume flow according to the calorimetric principle, which means the measurement procedure is independent of the process pressure and does not cause a permanent pressure drop.

The version testo 6447 offers everything the testo 6446 provides, in addition the removal of the probe under pressure is possible (patented screw fitting). The larger nominal values refer especially to important compressed air pipelines, often the main supply line after preparation.

• Measurement of norm volume flow in the measuring range 6.7 to 27500 m³/h (DN65 to DN350 or 21/2"-10")
• Exchangeable fitting: Probe removal under pressure possible (testo 6447 only)
• Material selectable between galvanized steel and stainless steel
• Highest flexibility thanks to different signal outputs: Analog output 4 to 20 mA (4-wire), Pulse output, 2 switch outputs (parameterizable: consumption or volume flow-dependent, opener, closer, hysteresis, window)
• Built-in totalizer, even without additional analysis unit
• Operating menu with LED display
• Cleanable sensor

0699 6447/15 6447 Compressed Air Meter by Testo

The compressed air counters testo 6441 to testo 6444 are designed for the measurement, monitoring and recording of compressed air consumption, and therefore also for the determination of leakages in compressed air systems, consumption-based allocation of costs and the implementation of peak load management. The compressed air counters testo 6441 to testo 6444 record norm volume flow according to the calorimetric principle, which means the measurement procedure is independent of the process pressure and does not cause a permanent pressure drop.

The version testo 6447 offers everything the testo 6446 provides, in addition the removal of the probe under pressure is possible (patented screw fitting). The larger nominal values refer especially to important compressed air pipelines, often the main supply line after preparation.

• Measurement of norm volume flow in the measuring range 6.7 to 27500 m³/h (DN65 to DN350 or 21/2"-10")
• Exchangeable fitting: Probe removal under pressure possible (testo 6447 only)
• Material selectable between galvanized steel and stainless steel
• Highest flexibility thanks to different signal outputs: Analog output 4 to 20 mA (4-wire), Pulse output, 2 switch outputs (parameterizable: consumption or volume flow-dependent, opener, closer, hysteresis, window)
• Built-in totalizer, even without additional analysis unit
• Operating menu with LED display
• Cleanable sensor

0555 6721 Dewpoint Switch (includes 0554 0647 sintered stainless steel fileter as standard) - 30 to + 30°C temperature pressure dewpoint (tpd) by Testo

The testo 6721 is a low-budget dewpoint guard with two switch contacts for controlling and monitoring refrigeration and adsorption dryers.

The continuous monitoring and control of compressed air dryers was up to now often not economically viable. The testo 6721 closes this gap. Whether integrated as a component in the dryer or pneumatic machine, or installed by the customer: With this compact solution, you increase the efficiency of your dryer. At the same time, you avoid follow-on damage to systems and products caused by excessive humidity in the compressed air.

• Measurement of dewpoints in the measuring range -45 to +30 °Ctd
• Inexpensive solution for monitoring cooling dryers
• Two switch outputs for monitoring limit values are available as outputs
• Long term stable and condensation-proof Testo humidity sensor (polymer sensor) guarantees highest process security
• P2A software for parameterization, adjustment and analysis saves time and costs in commissioning and maintenance
• Low-budget solution for monitoring refrigeration dryers
• Compact design allows easy integration into a refrigeration dryer or pneumatic machine
• Parameterization of unit and scale
• Setting 2 limit values and hysteresis
• testo 6721 adjustment: 1-point
• Reset to factory settings
• Testing of switch outputs
• Requesting of max./min. values
• Parameterization and adjustment history
• Serial number and firmware version can be called up

6321 Differential Pressure Transmitter - base unit, standard housing plastic by Testo

A differential pressure transmitter with a good price/performance ratio for applications in air conditioning and ventilation technology. The automated building services must always be monitored precisely, whereby the requirements placed on the measuring technology are increased. testo 6321 fulfills these requirements by ensuring the best possible system function, optimization of the climatic conditions and energy savings by means of highly accurate measurement, stable over the long-term, of the differential pressure.

Areas of application:

• Industrial and commercial buildings, e.g. in production and storage
• Offices and administrational buildings
• Sales areas and exhibition halls
• Museums and libraries
• School buildings, hotels, clinics etc.

• Measurement of differential pressure in the measuring range of 100 Pa to 2 bar
• Magnetic valve for automatic zero-point adjustment guarantees high temperature-independent accuracy and long-term stability
• Accuracy ±1.2 % of measuring range + intrinsic error of 0.3 Pa valid for zeroing cycle of 60 sec/nominal temperature +22 °C
• P2A software for parameterization, adjustment and analysis, saves time and costs in commissioning and maintenance
• Freely scalable: ±50% of measuring range final value and free scalability within the measuring range
• Diverse analog outputs and measuring ranges
• Display optional

6337 9741 Compact RH/Temp Transmitter, RTD 4-wire by Testo

The probe is suitable for fixed measurement of relative humidity and temperature, even in meteorological conditions (IP54 conditions).

Testoterm offers accessories which enable 2 mounting variations: wall mounting, insertion into a duct.