Testo650 water activity meter

Testeo 650 standard humidity measuring instrument with reading storage (up to 500000 readings), water activity probe, battery, lithium battery, and factory report.

Testo650 can measure temperature CO2、 Speed, current, and voltage.
At the same time, the testo 650 can also be used to measure humidity and pressure.
The testo 650 can be upgraded to the multi-functional measuring instrument testo 400. Upgrade the functionality to make it always capable of performing your measurement tasks. The software upgrade function ensures that you always use the latest technology.

Practical functions:

Calculate all parameters in the Moller diagram:
Relative humidity% RH, dew point and pressure dew point (td, tpd)
Absolute humidity g/m3, dry wet bulb temperature
Humidity (g/kg), water vapor pressure (mbar/hPa)
Enthalpy kcal/kg
Water activity measurement with trend chart
atmospheric pressure

List of advantages:

Special advantage: Automatic correction of absolute pressure to ensure accurate measurement. Water activity measurement with trend display and automatic identification of balance.
Clear graphical display
3 user-defined function keys
Press the button to save or print
Power interface/fast charging
Integrated printer
Quick on-site printing
Data transfer with PC
Barcode pen
Easy to operate
2 external probe sockets, automatically identifying the connected probes

Brief description	Order Number	order
Testo 650 standard temperature and humidity meter, including battery, spare lithium battery, and calibration certificate		-

Technical Specifications

Storage temperature	-25.0...60.0°C
Operating temperature	0.0...50.0°C
Battery Type	1.5 V AA
battery life	18.0 h
weight	500.0g
Specifications (LxWxH)	75.0 x 240.0 x 50.0 mm

Probe type (measured value)	range
CO2Probe (carbon dioxide)	0.0...10000.0 ppm CO2
Differential pressure>probe (pressure)	0.0... inH2O	+/-0.0 inH2O ( ... inH2O)
Pressure sensor 1 (Pressure)	0.0... inH2O
Pressure sensor 1 (Pressure)	0.0...25.0 psi
Pt100 (Temperature)	-200.0...800.0 °C	precision	+/-1.0°C (-200.0...-100.0°C) +/-0.4°C (-99.9...-50.0°C) +/-0.1°C (-49.9...99.9°C) +/-0.4°C (100.0...199.9°C) +/-1.0°C (200.0...800.0°C)
resolution	+/-0.1°C (-200.0...-100.0°C) +/-0.01°C (-99.9...300.0°C) +/-0.1°C (300.1...800.0°C)
Pt100 (Temperature)	-330.0...1500.0 °F	precision	+/-1.0°F (-330.0...-150.1°F) +/-0.4°F (-150.0...-58.1°F) +/-0.1°F (-58.0...212.0°F) +/-0.4°F (212.1...389.9°F) +/-1.0°F (390.0...1500.0°F)
resolution	+/-0.1°F (-330.0...-150.1 °F) +/-0.01°F (-150.0 ... 569.9 °F) +/-0.1°F (570.0 ... 1500.0 °F)
K型 (NiCr-Ni) (Temperature)	-200.0 . .. 1370.0 °C	precision	+/-1.0°C (-200.0...-100.1°C) +/-0.4°C (-100.0...200.0°C) +/-1.0°C (200.1...1370.0°C)
resolution	+/-0.1°C (-200.0...1370.0°C)
K型 (NiCr-Ni) (Temperature)	-330.0...2500.0 °F	precision	+/-1.0°F (-330.0...-150.1°F) +/-0.4°F (-150.0...389.9°F) +/-1.0°F (390.0...2500.0°F)
resolution	+/-0.1°F (-330.0...2500.0°F)
S-type (Pt10Rh Pt) (Temperature)	0.0...1760.0 °C	precision	+/-1.0°C (0.0...1760.0°C)
resolution	+/-1.0°C (0.0...1760.0°C)
S-type (Pt10Rh Pt) (Temperature)	32.0...3200.0 °F	precision	+/-1.0°F (32.0...3200.0°F)
resolution	+/-1.0°F (32.0...3200.0°F)
J-type (Fe CuNi) (Temperature)	-200.0...1000.0 °C	precision	+/-1.0°C (-200.0...-150.1°C) +/-0.4°C (-150.0...150.0°C) +/-1.0°C (150.1...1000.0°C)
resolution	+/-0.1°C (-200.0...1000.0°C)
J-type (Fe CuNi) (Temperature)	-330.0...1832.0 °F	precision	+/-1.0°F (-330.0...-240.1°F) +/-0.4°F (-240.0...299.9°F) +/-1.0°F (300.0...1832.0°F)
resolution	+/-0.1°F (-330.0...1832.0°F)
NTC (Temperature)	-40.0...150.0 °C	precision	+/-0.4°C (-40.0...-10.1°C) +/-0.2°C (-10.0...50.0°C) +/-0.4°C (50.1...150.0°C)
resolution	+/-0.1°C (-40.0...150.0°C)
NTC (Temperature)	-40.0...300.0 °F	precision	+/-0.4°F (-40.0...-14.1°F) +/-0.2°F (-14.0...121.9°F) +/-0.4°F (122.0...300.0°F)
resolution	+/-0.1°F (-40.0...300.0°F)
Testo humidity sensor, cap (humidity)	0.0...100.0 %rF	resolution	+/-0.1%rF (0.0...100.0%rF)
Testo humidity sensor, cap (humidity)	0.0...100.0 %RH	resolution	+/-0.1%RH (0.0...100.0%RH)
Differential pressure>probe (pressure)	0.0... hPa	precision	+/-0.1% measurement value (... hPa)
Testo humidity sensor, cap (humidity)	0.0...1.0 aW
Mechanical (rpm)	20.0...20000.0 U/min	resolution	+/-1.0 U/min (20.0...20000.0 U/min)
Mechanical (rpm)	20.0 . .. 20000.0 rpm	resolution	+/-1.0 rpm (20.0 ... 20000.0 rpm)
Current/voltage measurement (current (not used))	0.0...20.0 mA	precision	+/-0.04mA (0.0...20.0mA)
resolution	+/-0.01mA (0.0...20.0mA)
Current/voltage measurement (voltage AC)	0.0...10.0 V	precision	+/-0.01V (0.0...10.0V)
resolution	+/-0.01V (0.0...10.0V)
CO2Probe (carbon dioxide)	0.0...1.0 Vol. % CO2
CO probe (carbon monoxide)	0.0...500.0 ppm CO	precision	+/-5.0% measured value (0.0... 500.0ppm CO)
Pressure sensor 1 (Pressure)	0.0...2000.0 hPa	precision	+/-0.2% measurement value (... hPa)

Optional probe

Brief description	product image	range	accuracy	Order number
Thermocouples, fiberglass heat pipes (5 pieces/pack)		-200.0...400.0 °C
Pipeline probe with tear tape, suitable for a maximum diameter of 100mm		-50…+150℃
Precision air probe		-100…+400℃
Precision immersion probe, flexible, cable temperature resistance+300 ℃		-100…+265℃
Immersion/insertion probe, high precision		-100…+400℃
Viscous thermocouple (2 pieces/pack)
Immersion/insertion probe, high precision, with calibration certificate		-40.0...300.0 °C .0...2000.0 hPa
Surface probe, fast response, equipped with elastic thermocouple, with a range of up to+500 ℃ in a short time		-200…+300℃
Air probe, high precision, exposed sensor		-40…+125℃
Surface probe		-200…+600℃
Surface probe		-50…+400℃
Surface probe, bent 90 degrees, suitable for hard to reach areas		-200…+600℃
Immersion/insertion probe for gas and liquid measurement		-200…+600℃
Standard air probe		-200…+600℃
Immersion/insertion probe, sharpened measuring head, waterproof and anti baking		-200…+400℃
Surface probe, fast response, head bent 90 degrees, with elastic thermocouple		-200…+300℃
Immersion/insertion probe, fast response, used for high temperature measurement		-200…+1100℃
Immersion/insertion probe, fast response, used for measuring liquids		-200…+600℃
Immersion/insertion probe, fast response		-200…+400℃
Standard immersion/insertion probe		-200…+600℃
Standard immersion/insertion probe		-200…+400℃
Spare pipe clamp probe tip		-60…+130℃
Furnace probe with spare probe tip		-200…+1250℃
Plug in probe, 1030mm long, flexible, used for high temperature measurement, shell: nickel iron alloy		-200…+1100℃
Plug in probe, 550mm long, flexible, used for high temperature measurement, shell plated with nickel iron alloy 2.4816		-200…+1100℃
Plug in probe, 1200mm long, flexible, used for high temperature measurement, housing: 1.4541		-330…+900℃
Plug in probe, 750mm long, flexible, used for high temperature measurement, housing: stainless steel 1.4541		-200…+900℃
Drum type probe, used for measuring rolling objects, with a maximum speed of 18-400m/min		-50…+240℃
Magnetic probe with an adhesion of approximately 10N		-50…+400℃
Magnetic probe with an adhesion of approximately 20N		-50…+240℃
Immersion/insertion probe, made of V4A stainless steel, waterproof and anti baking		-200…+400℃
Mini surface probe		-200…+400℃
Infrared surface probe, fast non-contact measurement, used for measuring rotating components		-18…+260℃
Surface probe with elastic thermocouple, measuring range up to+700 ℃		-200…+700℃
Spherical temperature probe for measuring radiant heat		0…+120℃
Mechanical speed probe with plug
High voltage probe, made of stainless steel, with a pressure resistance of 40 bar, without cable		0.0...40.0 bar
High voltage probe, made of antifreeze stainless steel, with a pressure resistance of 435 PSI, without cable		0.0...30.0 bar
Low voltage probe, made of antifreeze stainless steel, without cable		-1.0...10.0 bar
Pressure probe, 800		0.0...800.0 inH2O 0.0...2000.0 hPa
Pressure probe, 40		0.0...40.0 inH2O 0.0...100.0 Pa
Pressure probe, 4		0.0...4.0 inH2O 0.0...10.0 hPa
Precision pressure probe, 0.4PSI, used for measuring differential pressure and wind speed (connected to pitot tube)		0.0...40.0 inH2O 0.0...100.0 Pa
Precision pressure dew point probe, used for measurement in compressed air systems, with a test point of -40 ° C tpd		0.0...100.0 %RH -60.0...50.0 °C tpd
Standard pressure dew point probe, used for measuring compressed air systems		-30.0...50.0 °C tpd
Precision air temperature and humidity probe with certificate		-20...+70℃， 0...+100%RH
Standard indoor air quality probe, temperature resistant to+70 ℃		-20...+70℃ 0...+100%RH
Pipeline temperature and humidity probe, can be connected to a telescopic handle		-20...+70℃， 0...+100%RH
High humidity probe with sensor heating element		0.0...100.0 %RH， -20.0 . .. 85.0 °C
Durable humidity probe, used for measuring balanced humidity or air outlet measurement		-20...+120℃， 0...+100%RH
Material humidity cable
Material humidity probe
Sword shaped temperature/humidity probe		-20...+70℃， 0...+100%RH
Water activity value set: pressure resistant precision humidity probe with certificate, measuring room, and 5 sampling containers		0...1aW，-20...+70℃ 0...+100%RH
Flexible humidity probe (not maintaining its original shape), used for measuring hard to reach areas		-20...+180℃， 0...+100%RH
Durable temperature/humidity probe, resistant to temperatures up to+180 ℃		-20...+180℃， 0...+100%RH
Flexible humidity probe		-20...+140℃， 0...+100%RH
Flexible humidity probe, miniature measurement module, module cable length 1500mm, module size 50 × 19 × 7		-20...+125℃， 0...+100%RH

Attachment

Brief description	annotation	Order Number
Illumination software with interface	Used to display data in the form of data or tables
Wind speed components, including measurement of air volume, comfort, etc	Upgrade through the repair center (upgrading testo 650 to testo 400)
Refrigerant calculation upgrade component, including all commonly used refrigerant parameters
Memory upgrade component, capable of storing 500000 readings	Expand memory space (upgraded by repair center)
Instrument sheath (anti impact), including hanging rope, magnetic bracket, and probe clamp	Prevent damage to instruments due to falling
Plastic system box	Safely and orderly store instruments and their accessories
Testeo 175/177 fastener specific lock
Printing labels (testo patent) for testo 575 printer (6 rolls/box)
Teflon protective cap, 5mm (5 pieces/pack) 16mm	Dustproof, suitable for measurement in high humidity and high wind speed environments
DKD calibration certificate/humidity	Saturated salt solution, with a calibration point of 75.3% RH
ISO calibration certificate/humidity	Saturated salt solution, with a calibration point of 75.3% RH
DKD calibration certificate/humidity	Saturated salt solution: calibration point at 11.3% RH
ISO calibration certificate/humidity	Saturated salt solution: calibration point at 11.3% RH
Pressure probe adapter, 1/2 'external thread, 1/4' internal thread
Handle, used for plug-in measuring tips
Adapter, used to connect NiCr Ni thermocouple and probe
Wire mesh protective cap, 12mm
Metal protective cap for 12mm humidity probe	Used in situations where the wind speed is less than 10m/s
Wire mesh filter, 21mm	Dust and damage prevention
Teflon sintered cap, 21mm, used in corrosive environments	In high humidity and high wind speed situations
Wire mesh protective cap for 21mm humidity probe	Used in situations where the wind speed is less than 10m/s
Stainless steel sintered cap, 21mm, threaded to humidity probe	Protecting probes under heavy mechanical loads and high wind speeds
Humidity probe calibration solution (33% RH)
Pressure probe magnetic bracket	Used for pressure probe 0638 1345/ .1445/..1545/. 1645mm adapter
RS232 shielded cable (connecting instrument and PC)
Aluminum alloy system box	Used for safe and orderly storage of instruments and accessories
Telescopic handle, 340-800mm long
Telescopic handle, with a maximum extension of 1m, used for probes with plugs	Cable: 2.5m long, PUR coated
Connect probes for pressure probes 0638 1740, 0638 1840,
Extension cable, 5m long, used to connect cables with plugs and instruments	PUR coating
Cable, 5m long, connecting probe with plug and instrument	PUR coating
Rechargeable battery pack (4 × 2.4V/700mAh)	Used for fast charging
Car power adapter	Used for charging instruments inside the car
Power supply, 230 V/8 V/1 A, European plug	Used for powering instruments and charging rechargeable batteries
Integrated printer, including 1 roll of thermal printing paper and battery	Quickly print on-site data
Barcode pen	Quickly and accurately read on-site information
Printer cover (dustproof, anti-collision)	Prevent instruments from being damaged due to falling
Plastic instrument box	Used for safe and orderly storage of instruments and their accessories
Cable, 1.5m long, connecting instrument and probe with plug	PUR coating
DKD calibration certificate/temperature	Instruments equipped with air/immersion probes; The calibration points are -20 ° C; 0 ° C;+60 ° C; MI greater 0.2 K
Thermal conductive silicone (14g), temperature resistant+260 ° C	Strengthen surface heat transfer
DKD calibration certificate/temperature	Instruments equipped with air/immersion probes; The calibration point is 0 ° C;+100 ° C;+200 ° C
Teflon sintered cap, 12mm, used in corrosive environments	High humidity and wind speed scenarios
Calibration fluid kit, 11.3% RH/75.3% RH, including humidity probe adapter	Used for rapid calibration of humidity probes
Surface humidity measurement adapter for 12mm humidity probe
Drilling protective cap, used for 12mm humidity probe	Measure the equilibrium humidity inside the borehole
Stainless steel sintered cap, 12 mm, threaded connection to humidity probe	Used in high wind speed or dusty environments
DKD calibration certificate/humidity	Electronic humidity meter; The calibration points are 11.3% RH and 75.3% RH at+25 ° C
ISO calibration certificate/humidity	Electronic humidity meter; The calibration points are 11.3% RH and 75.3% RH at+25 ° C
ISO calibration certificate/pressure	Absolute pressure; 5 calibration points distributed across the entire range
Current/voltage cable (± 1 V, ± 10 V, 20 mA)
DKD calibration certificate/pressure	Absolute pressure; 11 calibration points distributed throughout the full range (0.1-0.6% of the full range)
DKD calibration certificate/temperature	Contact surface temperature probe; The calibration points are+100 ° C;+200 ° C;+300 ° C
ISO calibration certificate/temperature	Instruments equipped with air/surface probes; The calibration points are 0 ° C;+150 ° C;+300 ° C
DKD calibration certificate/pressure	Differential pressure and positive pressure; 6 calibration points distributed across the full range (0.6% of the full range)
DKD calibration certificate/temperature	Instruments equipped with air/surface probes; The calibration points are -20 ° C; 0 ° C;+60 ° C
DKD calibration certificate/pressure	Differential pressure and positive pressure; 11 calibration points distributed across the entire range
ISO calibration certificate/pressure box)	Differential pressure; 5 calibration points distributed across the entire range
Immersion/insertion probe glass sleeve, corrosion-resistant
ISO calibration certificate/temperature	A thermometer equipped with a surface temperature probe; The calibration points are+60 ° C;+120 ° C;+180 ° C
Backup lithium battery	Data will not be lost during battery replacement or charging
ComSoft 3- Professional Edition Software	Including database, general analysis, and graphical functions
Spare thermal printing paper (6 rolls/box)
Testo printer, including 1 roll of thermal printing paper and 4 AA batteries	On site printing of data
Printer charger (including 4 standard rechargeable batteries)	Used for external charging of rechargeable batteries
RS232 cable	Connecting instrument and PC, 1.8m long, used for data transmission

The testo650 water activity meter (Water Activity, abbreviated as Aw) is mainly used to reflect the effective moisture, stability, and microbial growth potential of food in equilibrium state, as well as the chemical, enzymatic, and physical changes that can cause changes in food quality. It is commonly used to measure the ability of microorganisms to tolerate dryness. By measuring the water activity of food and selecting reasonable packaging and storage methods, the use of preservatives can be reduced, and the shelf life of food, grains, fruits, and vegetables can be determined.