The Vaisala HUMICAP HM70 portable humidity and temperature indicator is designed for demanding on-site humidity measurements.
The Vaisala HUMICAP Handheld Humidity and Temperature Meter HM70 is designed for demanding humidity measurements in spot-checking applications. It is also ideal for field checking and calibration of Vaisala's fixed humidity instruments.
Features
- Multilingual user interface
- Shows measurement trends graphically
- Multiprobe operation; dew point and CO2 probes can also be connected
- Displays various humidity parameters including dew point, ppm, water vapor pressure, saturation water vapor pressure, wet bulb temperature, absolute humidity, mixing ratio and enthalpy
- 2 Data can be logged, and transferred to a PC via MI70 Link software
- Displays various humidity parameters
- Sensor preheat and chemical purge options for demanding conditions
- 6-point traceable calibration (certificate included)
Vaisala HUMICAP Technology
The HM70 incorporates the latest generation of the Vaisala HUMICAP Sensor. It is reliable and has better than ever long-term stability. Additionally, it has a sensor that copes well with chemical interference and provides accuracy that lasts in demanding conditions.
Chemical Purge
The chemical purge option maintains measurement accuracy in environments with high concentrations of chemicals. The sensor preheat option reduces measurement delays as it keeps the sensor dry when the probe is inserted into hot and humid processes.
Three Probes to Choose From
The HMP75 is a general purpose probe whereas the HMP76 is a long, stainless steel probe especially suitable for spotchecking in ducts. The HMP77 is a small probe at the end of a 5-meter cable. The probe is ideal for dicult-to-reach areas and for on-site calibration of Vaisala's process transmitters. In addition, the HM70 supports the use of Vaisala's dew point, carbon dioxide and moisture in oil probes, allowing measurements in several multiparameter applications.
MI70 Link
The optional MI70 Link Windows software and the USB connection cable form a practical tool for transferring logged data and real time measurement data from the HM70 to a PC.
Relative Humidity | |
| Measurement range | 0 ... 100 %RH |
| Accuracy including non-linearity, hysteresis and repeatability. Defined as ±2 standard deviation limits: | |
| At +15 ... +25 °C (+59 ... +77 °F) | ±1 %RH (0 ... 90 %RH) ±1.7 %RH (90 ... 100 %RH) |
| At -20 ... +40 °C (-4 ... +104 °F) | ±(1.0 + 0.008 x reading) %RH |
| At -40 ... +180 °C (-40 ... +356 °F) | At -40 ... +180 °C (-40 ... +356 °F) |
| Factory calibration uncertainty (+20 °C / +68 °F) | ±0.6 %RH (0 ... 40 %RH) ±1.0 %RH (40 ... 97 %RH) |
| Response time (90%) at +20 °C (+68 °F) in still air: | |
| HMP75 (with standard plastic grid) | 17 s |
| HMP76 (with standard sintered bronze filter) | 60 s |
| HMP77 (with standard plastic grid and stainless steel netting) | 50 s |
| Typical long-term stability | better than 1 %RH / year |
Temperature | |
| HMP75 measurement range | -20 ... +60 °C (-4 ... +140 °F) |
| HMP76 measurement range | -50 ... +120 °C (-58 ... +248 °F) |
| HMP76 short time measurement range | -50 ... +180 °C (-58 ... +356 °F) |
| HMP77 measurement range | -70 ... +180 °C (-94 ... +356 °F) |
| Accuracy at +20 °C (+68 °F) | ±0.2 °C (±0.36 °F) |
| Accuracy over temperature range: | |
| Other Variables Available | dew point, frost point, absolute humidity, mixing ratio, wet bulb temperature,water content, vapor pressure, saturation vapor pressure, enthalpy, water activity |
| Humidity sensor | HUMICAP 180R HUMICAP 180RC (chemical purge,sensor preheat) |
| Temperature sensor | Pt100 RTD Class F0.1 IEC 60751 |
| Operating temperature range for electronics | -40 ... +60 °C ( -40 ... +140 °F) |
Standard Sensor Protection | |
| HMP75 | plastic grid |
| HMP76 | sintered bronze filter |
| HMP77 | grid with SS netting |
| Housing classification | IP65 (NEMA 4) |
| Housing material | ABS/PC blend |
| Probe material | Stainless steel (AIS316L) |
| Probe cable length (between indicator and the probe handle) | 1.9 m |
| Probe cable length of HMP77 (from handle to the root of probe) | 5.0 m |
| Probe diameter | 12 mm (0.47 inch) |
Weight | |
| HMP75 | 250 g |
| HMP76 | 350 g |
| HMP77 | 500 g |
Operating Environment | |
| Operating temperature | -10 ... +40 °C (+14 … +104 °F) |
| Operating humidity | 0 ... 100 % RH, non-condensing |
| Storage temperature | -40 ... +70 °C (-40 ... +158 °F) |
Inputs and Outputs | |
| Max. no of probes | 2 |
| Power supply | Rechargeable NiMH battery pack with AC adapter or 4xAA size alkalines, type IEC LR6 |
| PC interface | MI70 Link software with USB or serial port cable |
Analog Output | |
| Scale | 0...1 VDC |
| Output resolution | 0.6 mV |
| Accuracy | 0.2 % full scale |
| Temperature dependence | 0.002 %/˚C full scale |
| Minimum load resistor | 10 kΩ to ground |
Mechanical Specifications | |
| Housing classification | IP54 |
| Housing materials | ABS/PC blend |
| Weight | 400 g |
Compatibility | |
| EMC compliance | EN61326-1, Portable Equipment |
Other | |
| Menu languages | English, Chinese, Spanish, Russian, French, Japanese, German, Swedish, Finnish |
| Display | • LCD with backlight • Graphic trend display of anyparameter • Character height up to 16 mm |
| Alarm | Audible alarm function |
| Data logging capacity | 2700 real time data points |
| Logging interval | 1 s to 12 h |
| Logging duration | 1 min ... memory full |
| Resolution | 0.01 %RH, 0.01 °C/°F, 0.01 hPa, 0.01 aw, 10 ppm / 0.01% CO2 |
| Typical charging time | 4 hours |
Operation Times | |
| Continuous use | 48 h typical at +20 ˚C (68 °F) |
| Data logging use | up to a month |
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