Vaisala HMT333 temperature humidity & dew point sensor

Specifications

The Vaisala HUMICAP Humidity and Temperature Transmitter Series HMT330 is designed for demanding applications where stable meas

 

 

 

 

 

HMT330 Series Humidity and Temperature Transmitters for Demanding Humidity Measurement

The Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT330 is designed for demanding applications where stable measurement and wide customization is important.

• Six models for demanding applications:

• HMT331 for wall mounting

• HMT333 for duct mounting and tight spaces

• HMT334 for high pressures up to 100 bar and vacuum conditions

• HMT335 for high temperatures

• HMT337 for high humidity and meteorological applications

• HMT338 for pressurized pipelines up to 40 bar

• Warmed probe for superior performance in condensing environments

• Shows measurement trends and history graphically

• Corrosion resistant IP65 housing

• NIST traceable (certificate included)

• Optional integrated data logging, with over four years of measured history

• LAN and WLAN communication options

• Compatible with the Vaisala Continuous Monitoring System

Features/Benefits

• for remote probe installations in demanding HVAC applications

• for temperatures -40 ... +80 °C (-40 ... +176 °F) or -40 ... +120 °C (-40 ... +248 °F)

• Small thermal mass - fast response to temperature changes

• Application examples: cleanrooms, pharmaceutical processes, greenhouses, environmental chambers

The Vaisala HUMICAP® Humidity and Temperature Transmitter HMT333 is a versatile instrument for applications where a small remote probe is needed.

Flexible Installation

To install the probe in ducts, channels and through walls, an installation kit is available with a stainless steel flange, lead-through piece, and steel support bar. HMT333 has two probe cable options available, a flexible one that withstands heat up to +80° C, and a durable cable that withstands heat up to +120° C. Both cable options are available in lengths of 2, 5, and 10 meters.

Outputs and Power Supply Options for Every Need

The output options include three analog outputs, RS-232, RS-485, and alarm relays. The voltage supply range is from 10 to 35 VDC. With an additional module, the transmitter can be connected to all universal mains AC supplies. The input/output cable can be fed through the back of the transmitter, which is a useful feature, especially for installations in cleanrooms. for outdoor environments, the DTR502B solar radiation shield provides protection for the probe. The shield can be installed on a pole, a beam or a flat surface.

for Moderate Humidities and Temperatures

The HMT333 is typically used in demanding HVAC applications such as cleanrooms, pharmaceutical processes, and greenhouses, or in processes of moderate temperature. for environments with continuously high humidity, the HMT337 with a warmed, vapor-tight and stainless steel probe is recommended.

NOTE: The part number is built based on the options required. Please follow the link below to see the configurator and provide us with a complete part number for a price quote.

 

Specifications

Technical Specifications for HMT330 Series

Relative humidity measurement
Measurement range	0 ... 100 % RH
Accuracy at +20 °C (68 °F)	± 1.0 % RH (0 ... 90 % RH) ± 1.7 % RH (90 ... 100 % RH)
Factory calibration  uncertainty	(+20 °C) ± 0.6 % RH (0 ... 40 %RH) ± 1.0 % RH (40 ... 97 %RH) (Defined as ±2 standard deviation limits. Small variations possible, see also calibration certificate.)
Sensor	Vaisala HUMICAP® 180(C) Vaisala HUMICAP® 180R(C)
Temperature measurement Measurement range
HMT331	-40 ... +60 °C (-40 ... +140 °F)
HMT333	-40 ... +80 °C or -40 ... +120 °C (-40 ... +176 °F or -40 ... +248 °F)
HMT334/335/337/338	-70 ... +180 °C (-94 ... +356 °F)
Accuracy at +20 °C (68 °F)	± 0.2 °C
Sensor	Pt100 RTD 1/3 Class B IEC 751
Other variables available (depends on model)
Dewpoint, temperature, mixing ratio, absolute humidity, wet bulb temperature, enthalpy, water vapor pressure.
Operating environment
Temperature
for probe	same as measurement ranges
for transmitter body	-40 ...+ 60 °C (-40 ... +140 °F)
with display	0 ...+ 60 °C (+32 ... +140 °F)
Pressure
HMT334	0 ... 10 MPa (0 ... 100 bar)
HMT338	0 ... 4 MPa (0 ... 40 bar)
HMT333/335/337	vapor tight
Inputs and outputs
Operating voltage with optional power  supply module Power consumption @ 20 °C (Uin24 VDC)	10 ... 35 VDC, 24 VAC 100 ... 240 VAC 50/60 Hz
RS-232	max. 25 mA
Uout2 x 0 ... 1 V/ 0 ... 5 V/ 0... 10 V	max. 25 mA
Iout2 x 0 ... 20 mA V	max. 60 mA
Analog outputs current output voltage output Digital outputs	0 ... 20 mA, 4 ... 20 mA 0 ... 1 V, 0 ... 5 V, 0 ... 10 V RS-232, RS-485 (optional)
Ethernet interface (optional) Supported standards Connector Protocols	10/100Base-T RJ45 Telnet
WLAN interface (optional)	802.11b
Supported standards	RP-SMA
Antenna connector type	Telnet
Protocols	WEP 64/128,WPA
Security	Authentication / Encryption Open / no encryption Open / WEP WPA Pre shared key / TKIP WPA Pre shared key / CCMP (a.k.a. WPA2)
Optional data logger with real-time clock Logged parameters Logging interval  Max. logging period Logged points  Battery lifetime	max. three with trend/min/max values 10 sec (fixed) 4 years 5 months 13,7 million points per parameter min. 5 years
Menu languages	English, French, Spanish, German, Japanese, Russian, Swedish, Finnish, Chinese
Mechanics Probe cable diameter
HMT333	6.0 mm
other probes	5.5 mm
Material (housing)	G-AlSi 10 Mg (DIN 1725)
Housing classification	IP65 (NEMA 4)