Vaisala HMP41, HMP42, HMP45 Technical data

Vaisala Instruments Catalog 2009

Ref. B210768EN rev. A

HMP41, HMP42 and HMP45 Probes for HMI41 Indicator

P.O. Box 26, FI-00421 Helsinki, FINLAND

Tel: +358 9 894 91

Fax: +358 9 8949 2485

Email: industrialsales@vaisala.com

www.vaisala.com/HMI41

e HMI41 indicator with the HMP41 probe.

HMI41 with the HMP42 probe.

Features/Beneﬁts

• Humidity measurement range

0 ... 100 %RH

• 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

• e HMI41 Indicator can be used

with any of the four available probes

• Extremely thin 4 mm probe head

(HMP42)

• Incorporates Vaisala HUMICAP®

Sensor, which provides high accuracy, excellent long-term stability, neglible hysteresis, and insensitivity to dust and most chemicals

• NIST traceable (certicate included)

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.

e 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 format.

Ideal for spot checking applications

e 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.

Vaisala HUMICAP® Humidity and Temperature Probe HMP41:

is probe is x-mounted directly on the HMI41 indicator. It can be upgraded to an HMP45 by purchasing the HMH45 handle and cable option.

Vaisala HUMICAP® Humidity and Temperature Probe HMP42:

e HMP42 probe can be used for spot checking humidity and temperature in applications which require an extremely thin probe, such as:

• formonitoringthedryingof 

structures during construction or after water damage

• intightplaces

• inductsorchambers

• underalinoleumoor

e probe diameter is only 4 mm, allowing access into very small, tight, and hard-to-reach spaces.

Vaisala HUMICAP® Humidity and Temperature Probe HMP45:

is probe for general purposes features an extended spiral cable.

Vaisala HUMICAP® Humidity and Temperature Probe

HMP46:

See preceding data sheet.

HMI41 with the HMP45 probe.

Vaisala Instruments Catalog 2009

Ref. B210768EN rev. A

HMP41, HMP42, HMP45

Ø 18.5

Ø 21

237

118

106

Ø 18.5

318

200

125

Technical Data

HUMIDITY

DEWPOINT

HMP41, HMP42, and HMP45 probes

Humidity

Measurement range 0 ... 100 %RH Accuracy at +20 °C (+68 °F) when calibrated against salt solutions (ASTM E014-85) ±2 %RH (0 ... 90 %RH) ±3 %RH (90 ... 100 %RH) Temperature dependence of electronics ±0.05 %RH/°C Typical long-term stability better than 1 %RH per year Response time (90%) at +20 °C in still air (HMP41, HMP45) 15 s (HMP42) 30 s Sensor HMP41 & 45 HUMICAP® 180 Sensor HMP42 HUMICAP® MINI

Temperature

Measurement range probe HMP41, HMP45 -20 ... +60 °C (-4 ... +140 °F) HMP42 -40 ... +100 °C (-40 ... +212 °F) Temperature accuracy over measurement range Sensor (HMP41 & 45) PT 1000 IEC 751 1/3 class B (HMP 42) PT 100 IEC 751 class B

Accessories

Serial interface cable 19446ZZ Carrying case for HMI41 and HMP41/45 HM36736 Aluminum case for HMP41/42/45/46 MI70CASE2 Rigid plastic case for HMP41/42/45/46 210614 HMP42 Calibration adapter HM37067

Rubber sleeve set 19809HM

Dimensions

Dimensions in mm.

HMI41 HMP42

HMP41 HMP45

General

Typical ranges of calculated variables dewpoint temperature -20 ... +60 °C (-4 ... +140 °F) absolute humidity 0 ... 160 g/m wet bulb temperature 0 ... +60 °C (32 ... +140 °F) mixing ratio 0 ... 160 g/Kg d.a. e accuracies of these calculated variables are limited by the accuracies of the measured variables on which they are based, namely RH and T. e RH and T accuracies are stated above in the probe section. Cable length (HMP42 & 45) 1500 mm; extended spiral cable Operating temperature range HMP41 -20 ... +60 °C (-4 ... +140°F) HMP42 -40 ... +100 °C (-40 ... +212 °F) HMP45 -40 ... +60 °C (-40 ... +140 °F) Battery operation time (alkaline batteries) 72 h continuous use Housing material ABS plastic Housing classication, electronics IP65 (NEMA 4) Sensor protection HMP41 & 45 plastic grid HM46717 option membrane lter 2787HM HMP42 steel grid 19867HM membrane tube set (5pcs) 19858HM Weight HMP41 30 g HMP42 200 g HMP45 160 g Electromagnetic compatibility Complies with EMC standard EN61326-1, Portable Equipment.