Testo 645 Humidity Meter

Long-term stable, highly accurate humidity sensor, data analysis using comSoft 3.

Features

  • 4-line display
  • Integrated RS232 interface
  • Non-contact transmission of measurement logs via infrared
  • Saves up to 3000 readings
  • Selects up to 99 locations
  • Quick printout of data on location
  • Holds max/min/mean values

The testo 645 humidity measuring instrument automatically displays the parameters relative humidity, absolute humidity, dew point, degree of humidity, enthalpy and temperature. Convenient data analysis on your PC with location name.

The 645 provides quick-action temperature measurements using NiCr-Ni probes, highly accurate temperature measurement using 1/10 DIN Pt100 probes and "Zero errror adjustment" offset is saved in probe. The TopSafe case protects your measuring instrument from impact, dust and water. Ideal for tough industrial applications.

The 645 measures:

  • Dew point
  • Absolute humidity
  • Degree of humidity
  • Enthalpy

Cables

Testo RS232 Cable
Testo RS232 Cable

Connects Testo 545/645 light meter to PC for data transfer.

$104.00 $93.60

Printers

Testo Infrared Printer
Testo Infrared Printer

Testo printer with wireless IRDA and infrared interface.

$419.00 $377.10
Testo Thermal Printer Paper
Testo Thermal Printer Paper

Thermal paper for Testo Infrared printer .

In Stock
$46.00 $41.40

Sensors/Probes

Testo HUMIDITY-MOISTURE Probes
Testo HUMIDITY-MOISTURE Probes

High temperature/humidity, Flexible humidity probe and Water activity (aW) probe.

Starting at $1,499.00 $1,349.10
Testo Humidity / Temperature Immersion / Penetration Probe
Testo Humidity / Temperature Immersion / Penetration Probe

For equilibrium moisture or for measurements in exhaust ducts to +120°C,.

$396.00 $356.40
Testo Temperature Probes
Testo Temperature Probes

Pt100 immersion / penetration probe or flexible immersion probe.

Starting at $603.00 $542.70

Accessories

Please consider these optional accessories.

Testo TC with Tube
Testo TC with Tube

TC with tube and plug NiCr-Ni.

$249.00 $224.10
Testo Silicone Heat Conducting Paste
Testo Silicone Heat Conducting Paste

Silicone heat conducting paste 0.49 oz / 14 g.

$34.00 $30.60
Testo RH Calibration Set
Testo RH Calibration Set

Perform quick checks or full calibrations for humidity probes.

$499.00 $449.10
Testo Sintered Cap
Testo Sintered Cap

Sintered cap 21mm diameter.

$76.00 $68.40
Testo Teflon Sintered Filter
Testo Teflon Sintered Filter

Teflon sintered filter (21mm) diam.

$94.00 $84.60
Testo Sensor metal protective cap
Testo Sensor metal protective cap

Sensor metal protective cap (slotted), Ø 12 mm, flow velocities of < 7 m/s.

$62.00 $55.80
Testo Teflon Sintered Filter
Testo Teflon Sintered Filter

Testo Teflon Sintered Filter.

$89.00 $80.10
Testo PTFE (Teflon) sintered filter
Testo PTFE (Teflon) sintered filter

Ø 12 mm, not affected by condensation, water-repellent, resistant to corrosive substances.

$133.00 $119.70
Testo Replacement TC head
Testo Replacement TC head

Replacement TC head for Pipe Clamp Probe.

$85.00 $76.50