GENEQ > Meteorology > Transmitters

Intrinsically Safe Humidity and Temperature Transmitters
HMT360 Series

  
HUMICAP humidity and temperature transmitter series HMT360 are the ideal solution for measuring humidity in hazardous areas. They operate safely and reliably even in the most hazardous classifictions. The HMT360 transmitters' proven performance and technology conform with rigous international standards.

FEATURES & BENEFITS
  • Measures humidity and temperature, outputs also dewpoint, mixing ratio, absolute humidity and wet bulb temperature
  • Safe operation with entire transmitter in hazardous areas: Division 1 and 2 (USA, Canada), Category 1G / Zone 0 (EU)
  • Intrinsically safe
  • Excellent performance in harsh conditions
  • HUMICAP Sensor features high accuracy, excellent long-term stability, and negligible hysteresis
  • Five interchangeable probes
  • Temperature range between -40 and 180°C (-40 and 356°F)
  • NIST traceable (certificate included)
    		•

    INTRINSICALLY SAFE
    The entire HMT360 transmitter can be installed directly in explosive areas. It can withstand continuous exposure to potentially explosive environments that contain flammable gases.

    CUSTOMIZED CONFIGURATION
    Due to the microprocessor based electronics, options and accessories, the HMT360 series is truly flexible. Customers may specify the transmitter configuration when ordering the instrument, however they may change the configuration in the field.

    FIVE INTERCHANGEABLE PROBES
    The HMT360 offers five probe options for various applications
       HMP361 Wall mount
       HMP363 Confined spaces
       HMP364 High pressure
       HMP365 High temperature
       HMP368 Pressurized pipelines
    The interchangeable probes enable fast and easy removal or re-installation when required. Calibration, for example, is easy to perform due to the modular structure. All calibration coefficients are included in the probe unit itself, which means tht probes can be switched between transmitter bodies without losing the accuracy.

    OPTIMIZED SENSORS
    In addition to standard HUMICAP Sensor, also application specific, very chemically durable sensor is available.

    LONG-TERM SOLUTION
    The HMT360 transmitters are an investment: their rugged design, combined with trouble-free operation, ensure a long-term solution for monitoring humidity and dewpoint in explosive environments.

    SPECIFICATIONS
    Measured Variables
    Relative humidity
    Measurement range 0 to 100%
    Accuracy (including nonlinearity, hysteresis and repeatability) Max. achievable accuracy when calibrated against high quality, vertified humidity standards ±1% RH (0 to 90%RH)
    ±2% RH (90 to 100%RH)
    Accuracy (including nonlinearity, hysteresis and repeatability) When calibrated against salt solutions (ASTM E104-85) ±2% RH (0 to 90%RH)
    ±3% RH (90 to 100%RH)
    Response time (90%) at 20°C 15 seconds (in still air with sintered filter)
    Sensors
  • HUMICAP 180 for typical applications
  • HUMICAP 1880L2 for applications with a demanding chamical environment
    		•
    Temperature
    Measurement range -40 to 180°C (-40 to 356°F) depends on selected probe
    Typical accuracy of electronics at 20°C ±0.1°C (±0.18°F)
    Typical temperature dependence of electronics 0.005°C/°C (0.005°F/°F)
    Sensor Pt 1000 RTD 1/3 Clas B IEC 751
    Calculated variables (typical ranges)
    With HMP361 probe
    Dewpoint temperature -20 to 60°C (-4 to 140°F)
    Mixing ratio 0 to 160 g/kg d.a.
    Absolute humidity 0 to 160g/m3
    Wet bulb temperature 0 to 100°C (32 to 212°F)
    With HMP363, HMP364, HMP365 and HMP368 Probes
    Dewpoint temperature -20 to 100°C (-4 to 212°F)
    Mixing ratio 0 to 160 g/kg d.a.
    Absolute humidity 0 to 500 g/m3
    Wet bulb temperature 0 to 100°C (32 to 212°F)
    The accuracies of these calculated variables are limited by the accuracies of the measured variables on which they are based, namely RH and Temperature. The RH and Temperature accuracies are stated above under Measured Variables.
    Outputs
    Two analog outputs Two wire 4 to 20 mA (on standard, one optional)
    Typical accuracy of analog outputs at 20°C ±0.05% full scale
    Typical temperature dependence of analog outputs 0.005%/°C (0.005%°F) full scale
    Analog outputs Connection via safety barriers
    RS232C serial output for service use Connector type RJ45
    Classification with current outputs
    Europe / CENELEC (PTB)
    EU (94/9/EC, ATEX100a) II1G, EEx ia IIC T4
    PTB 00 ATEX 2112 X
    Safety factors Ui=28 V, Ii=100mA, Pi=0.7W
    Ci=1 nF, Li=0 H
    Environmental specifications Tamb: -20 to 60°C (-4 to 140°F)
    Pamb: 0.8 to 1.1 bar
    USA (FM)
    Classes I, II, III, Division 1, Groups A-G and Division 2 Groups A-S-F and G
    FM Project ID: 3010615
    Safety factors Vmax=28 VDC, Imax=100mA, Ci=1nF, Pi=0.7W, Li=0, Tamb = 60°C (140°F), T5
    Japan (TIIS)
    Ex ia IIC T4
    Code number: C15354
    Safety factors Ui=28 VDC, Ii=100 mA, Ci=1nF, Pi=0.7W, Li=0, Tamb = 60°C (140°F)
    Australia (TestSafe)
    Ex ia IIC T5 IP65
    Certificate no: Ex AUS Ex 3738X
    Safety factors Ui=28 V, Ii=100mA, Pi=0.7W, Ci=1 nF, Li=0 mH
    Canada (CSA)
  • Class I, Division 1 and Division 2, Groups A, B, C, D
  • Class II, Division 1 and Division 2, Groups G nd Coal Dust
  • Class III
    		•
    Safety factors Tamb = 60°C, T4, Intrinsically safe when connected as per installation drawing DRW213478
    General
    Operating voltage 12 to 28V
    Operating voltage with serial port (service mode) 15 to 28V
    Connections Screw terminals, 0.33 to 2.0mm2
    Wires (AWG 14-22)
    Cable bushing Pg11 (5 to 12mm)
    Conduit fitting Pg11/NPT 1/2 in.-14
    Operating temp. range for electronics -40 to 60°C (-40 to 140°F)
    Operating temp. range for electronics with display -20 to 60°C (-4 to 140°C)
    Storage temperature range -40 to 70°C (-40 to 158°F)
    Housing material G-AlSi10Mg (DIN 1725)
    Housing classification IP65 (NEMA 4)
    Housing weight 950g
    Display Two-line LCD
    Character Size 1st line/2nd line) 12mm/10mm
    Calculated output variables Dewpoint temperature, mixing ratio, absolute humidity, wet bulb temperature
    Additional analog output 4 to 20 mA
    Complies with EMC standard EN61326-1:1997 + Am1:1998
    Industrial environment
    Note: IEC 1000-4-5 complies only when using external
    Exi approved surge arrester on safe area

    CAT. NO. DESCRIPTION
    VAHMT360-0 Intrinsically safe humidity and temperature transmitter
    Interchangeable Probes
    VAHMP361-0 Interchageable probe for wall mounting
    VAHMP363-0 Interchangeable probe for confined spaces
    VAHMP364-0 Interchangeable probe for high pressure
    VAHMP365-0 Interchangeable probe for high temperature
    VAHMP368-0 Interchangeable probe for pressurizd pipelines
    Options and Accessories
    VAHMP233FAH Duct mounting installation kit for HMP363)
    VAHMP235FA Installation flange for HMP365 (aluminium)
    VAHMP235FS Installation flange for HMP365 (stainless steel)
    VADMP248BVS Ball valve set for HMP368. Pressure range at 20°C: 0 to 40 bar (Durig installation max. 10 bar)
    VA25905ZZ- Serial interface cable for PC connectors RJ45-D9 female