HMI41 Indicator and HMP46 High Temperature Probe

The Vaisala HUMICAP® Humidity Indicator HMI41 fitted with the Vaisala HUMICAP® Humidity and Temperature Probe HMP46 can be used for spot checking humidity and temperature in ducts or chambers. Typical applications are plant maintenance, installation and inspection of air conditioning systems, production and storage areas and production processes.

Features/Benefits

•  RH measurement range 0...100 %Rh

• +/- 1% accuracy

• Temperature Measurement Range -40...+100 °C  (-40…212 °F), for short periods up to +180 °C (+356 °F)

• Calculates dewpoint, wet bulb temperature, absolute humidity and mixing ratio

• Versatile and easy-to-use

• Excellent stability

• Data collection with serial line download capacity

Versatile and easy to use

In addition to displaying the humidity and temperature readings, the HMI41 indicator calculates dewpoint and wet bulb temperature, absolute humidity and mixing ratio. The indicator has an easy-to-read two line liquid crystal display. The display units (metric or non-metric) are easily selected.

These features, plus fast response time, high measurement accuracy and excellent stability, as well as the wide temperature range of the probe, make the HMI41/HMP46 combination an ideal choice for the most demanding applications.

High performance sensor

The HMP46 probe incorporates Vaisala HUMICAP® Sensor. This sensor has high accuracy, excellent long-term stability and negligible hysteresis. In addition, the sensor is insensitive to dust, particulate dirt and most chemicals.

Withstands high temperatures

The HMP46 operates in full humidity range of 0...100 %RH. The temperature range is from -40 to +100 °C (-40…+212 °F). For short periods of time, the probe can withstand temperatures up to +180 °C (+356 °F). The HMP46 probe is solid and rugged. Its stainless steel probe head is made to withstand rough handling in mechanically demanding applications. The probe’s long shaft can also reach otherwise unreachable places.

HMP41, HMP42 and HMP45 Probes for HMI41 Indicator

Vaisala HUMICAP® Humidity Indicator HMI41 can be used with any one of the four probes to quickly and easily measure humidity and temperature, and to make other measurement calculations such as dewpoint, wet bulb temperature, absolute humidity and mixing ratio.

The HMI41 has an easy-to-read LCD display. Temperature readout is available in either degrees Centigrade or Fahrenheit. Calculated variables are available in metric and non-metric.

Features/Benefits

•  RH measurement range 0...100 %Rh

• +/- 1% accuracy

• Temperature measurement range HMP41, HMP45: -20...+60 °C (-4…+140 °F) HMP42: -40...+100 °C (-40…212 °F)

• For spot checking measurements

• Versatile and easy-to-use

• The HMI41 Indicator fits with all probes

• Extremely thin 4 mm probe head (HMP42)

• Incorporates Vaisala HUMICAP® Sensor, which provides high accuracy, excellent long-termstability, neglible hysteresis, and insensitivity to dust and most chemicals

Ideal for spot checking applications

The HMI41 indicator with probes is ideal for use in a variety of spot checking applications such as plant maintenance, air-conditioning system installation and inspection, freezers and storage and production areas.

This probe is fix-mounted directly on the HMI41 indicator. It can beupgraded to an HMP45 by purchasing the HMH45 handle and cable option

The HMP42 probe can be used for spot checking humidity and temperature in applications which require an extremely thin probe.

This probe for general purposes features an extended spiral cable.

HM34 Pocket Size Relative Humidity Meter

The Vaisala HUMICAP® Hand-Held Humidity and Temperature Meter HM34 provides a fast and convenient way to accurately spot-check relative humidity and temperature.

Features/Benefits

•   Ideal for spot checking humidity levels

•  Measurement range 0...100 %RH

•  Fast response with ±2% accuracy

• Temperature measurement range

•  20...+60 °C (-4…+140 °F)

• Lightweight, pocket-sized

• Incorporates Vaisala HUMICAP®Sensor that provides high accuracy, excellent long-term stability, neglible hysteresis, and insensitivity to dust and most chemicals

• Extendable probe

• Automatic POWER-OFF

• Available in either °F or °C

Vaisala HUMICAP performance

The HM34 incorporates the Vaisala HUMICAP® Sensor, which is accurate, durable and insensitive to dust and most chemical contaminants. Both the humidity and temperature sensors are housed in an extendable probe that retracts back into the rugged plastic casing for storage, creating a compact and easy to carry device.

Fast and Easy-to-use

In measurement mode, the extendable probe just slides out. Normally, measurement takes only a few seconds.  The HM34 meter includes a HOLD button which allows the user to retain an RH or T measurement until it has been noted or recorded.

If no buttons are pressed for three minutes, the unit automatically switches itself off. This automatic POWER-OFF function prevents the possibility of accidental discharge of the HM34’s battery.