Vaisala HMT140 Wi-Fi Data Logger

Features

  • Wi-Fi connectivity to Vaisala viewLinc environmental monitoring system software.
  • Connectivity is provided through existing Wi-Fi Access Points.
  • Autonomous operation and local alarms ensure alerting capability regardless of network connectivity.
  • Local data storage provides continuous fail-safe operation.
  • 18-month battery operation.
  • Vaisala HUMICAPâ technology with humidity sensor HUMICAP 180R.
  • Interchangeable relative humidity and temperature probe for easy field calibration.
  • Accurate and reliable multi-signal measurements
  • Resistant to dust and most chemicals.
  • Traceable to SI units through national metrology institutes.
  • Ideal for cleanrooms and other life science applications.
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Dpstar is a leading supplier of environmental measurement sensors for temperature, relative humidity, pressure, dew point, CO2, and other environmental condition monitoring for industrial process application and research. Since the ’90s, we earned a reputation as a trusted partner to our clients through our commitment and dedication. We are an authorized distributor and supplier of measuring sensors solutions from renowned manufacturers Vaisala. Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Vaisala is a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services.

Vaisala Wi-Fi Data Logger HMT140 is designed for humidity, temperature, and analog signal monitoring in warehouses, freezer and cryogenic farms, laboratories, blood banks, and many other applications.

Performance

HMT140 incorporates Vaisala HUMICAP technology to measure relative humidity and temperature accurately and reliably. The HUMICAP sensor is resistant to dust and most chemicals. Alternatively, HMT140 can connect to Resistance Temperature Detectors (RTDs) or Voltage, Current, and Door Contact sensors, making HMT140 an extremely versatile Wi-Fi data logger. Combining RTD and contact inputs, HMT140 is ideal for monitoring chamber/door contact excursions. Using Wi-Fi connectivity, HMT140 can connect through any wireless access point. The battery-powered logger can operate for 18 months continuously. The optional local display allows HMT140 to indicate process parameter values and any limit warnings. The LCD display is operated using a power-saving infrared sensor that is motion-activated. When activated, the display indicates the current measurements. All data is logged locally and uploaded to the Vaisala viewLinc monitoring system software at preset intervals and during any parameter excursions. Autonomous operation with audible and visual alarming (beep and flashing LED) ensures that local alerts are indicated independent of active network or server connection. The data logger’s enclosure is optimized for use in cleanrooms with a surface that is easy to clean and tolerates purifying agents.

Interchangeable Probe

HMT140 data logger uses an easily replaceable relative humidity and temperature probe. This allows for a quick recalibration of the data logger. The probe can be adjusted using one of Vaisala’s portable meters as a reference.

Available Options

The HMT140 data logger is available as wall-mounted or with remote probes. For extreme temperature applications or where space is limited, the remote probe is ideal.

Specification

relative Humidity
Measurement range 0 … 100 %RH
Accuracy: 1)
At temperature range 0 … +40 °C (+32 … +104 °F): 0 … 90 %RH ±1.5 %RH
90 … 100 %RH ±2.5 %RH
At temperature range −40 … 0 °C, +40 … +80 °C (−40 … +32 °F, +104 … +176 °F): 0 … 90 %RH ±3.0 %RH
90 … 100 %RH ±4.0 %RH
Factory calibration uncertainty at +20 °C (+68 °F): 0 … 90 %RH ±1.1 %RH
90 … 100 %RH ±1.8 %RH
Humidity sensor HUMICAPâ 180R
Stability ±2 %RH over 2 years
Temperature
Measurement range −40 … +80 °C (−40 … +176 °F)
Accuracy over temperature range: +15 … +25 °C (+59 … +77 °F) ±0.2 °C (±0.36 °F)
0 … +15 °C, +25 … +40 °C (+32 … 59 °F, +77 … +104 °F) ±0.25 °C (±0.45 °F)
−40 … 0 °C, +40 … +80 °C (−40 … +32 °F, +104 … +176 °F) ±0.4 °C (±0.72 °F)
Temperature sensor Pt1000 RTD 1/3 Class B IEC 751
HMP110 probe −40 … +80 °C (−40 … +176 °F)
Storage temperature −50 … +70 °C (−58 … +158 °F)
1) Incl. non-linearity, hysteresis, and repeatability.
temperature Probes
Resistive Temperature Input Signals
Temperature sensor Pt100 RTD / 4 wire, Class A IEC 751
Input impedance 5.1K Ω
Measurement range −196 … +90 °C (−320.8 … +194 °F)
Accuracy over temperature range: −196 … −90 °C (−320.8 … −130 °F)
−90 … −30 °C (−130 … −22 °F)
−30 … 0 °C (−22 … +32 °F)
0 … +50 °C (+32 … +122 °F)
+50 … +90 °C (+122 … +194 °F)		 ±2.5 °C (±4.5 °F)
±0.75 °C (±1.35 °F)
±0.5 °C (±0.9 °F)
±0.25 °C (±0.45 °F)
±0.75 °C (±1.35 °F)
Analog Inputs
Current input signals 0 … 22 mA
Resolution 0.67 μA
Accuracy ±0.15 % F.S. at +25 °C (+77 °F)
Input impedance 62 Ω
Overload protection 40 mA
Voltage input signals 0 … 5 V, 0 … 10 V
Resolution 0.0034 % F.S.
Accuracy ±0.15 % F.S. at +25 °C (+77 °F)
Input impedance 37K Ω
Overload protection 50 V max.
Isolation One common per logger
Contact inputs Open/Closed with magnetic reed switch cable connections (dry contact)
measurement Variants
Model Measurement channels
HMT141 1 temperature and 1 humidity channel
HMT143 2 RTD temperature channels
HMT144 2 voltage inputs (0 … 5 VDC)
HMT145 2 voltage inputs (0 … 10 VDC)
HMT146 2 current inputs (0 … 20 mA)
HMT147 2 door contacts
HMT148 1 RTD temperature and 1 door contact
HMT14D 1 RTD temperature and 1 current input (0 … 20 mA)
HMT14E 1 RTD temperature and 1 voltage input (0 … 5 VDC)
HMT14F 1 RTD temperature and 1 voltage input (0 … 10 VDC)
operating Environment
Operating Temperature
Data logger body, no display −40 … +60 °C (−40 … +140 °F)
Data logger body, with display −20 … +60 °C (−4 … +140 °F)
IP rating IP65
Maximum operating altitude 2000 m (6 500 ft)
General Specifications
Memory 3,060 samples
Sample rate User selectable (interval: 2 … 60 minutes)
Display (optional) 128 × 64 resolution full graphics
B&W display without backlight
Mechanical Specifications
Weight (with battery/without probe) 300 g (10.6 oz)
Screw terminals 26 AWG … 20 AWG
HMP110 probe interface 4-pin M8 female panel connector
HMP110 probe cable lengths 3 m, 5 m, and 10 m (9.8 ft, 16.4 ft, and 32.8 ft)
Hermetic door switch sensor cable length 7.6 m (24.9 ft)
Material
Data logger housing PBT plastic
Display window PC plastic
HMP110 probe body Stainless steel (AISI 316)
HMP110 probe grid filter Chrome coated ABS plastic
RTD Temperature Sensor
Sensor tip material Stainless steel (AISI 316)
Sensor tip length 50.8 mm (2 in)
Sensor tip diameter 4.76 mm (0.19 in)
Cable length 5 m (16.4 ft)
wireless Specifications
Networking standards IEEE 802.11b/g
Data rates 802.11b: up to 11 Mbps
802.11g: up to 54 Mbps
Frequency band 2402 ~ 2480 MHz
Wi-Fi security WEP (128-bit), WPA, WPA2 (Personal)
Output power +18 dBm (63 mW)
Receiver sensitivity −85 dBm typical
Antenna Onboard whip
Contains FCC ID: U3O-G2M5477
IC ID: 8169A-G2M5477
NCC ID: CCAF11LP0240T6
Compliance
EMC compatibility 1) EN 61326-1
EN 301 489-1
EN 300 328 V2.1.1
Electrical safety EN 61010-1
Radio transmission equipment type approval CMIIT ID: 2019DJ5109
Compliance marks FCC, RCM, ROHS
1) Due to updated regulations (ETSI EN 300 328 V2.2.2a), HMT140 will no longer be available for purchase in the following countries from Aug. 6th, 2021, onwards: EU countries, Iceland, Liechtenstein, Turkey, Norway, Switzerland, and the UK. The regulations do not affect devices already in use.
Spare Parts And Accessories
HMP110
Humidity and temperature probe HMP110 1)
Humidity and temperature replacement probe HMP110R 1)
Humidity sensor Vaisala HUMICAPâ 180R
Probe mounting flange 226061
Probe mounting clamps, 10 pcs 226067
Probe cable 3 m (9.8 ft) HMT120Z300
Probe cable 5 m (16.4 ft) HMT120Z500
Probe cable 10 m (32.8 ft) HMT120Z1000
Duct installation kit 215619
Sensor Protection
Plastic grid filter DRW010522SP
Plastic grid with membrane filter DRW010525SP
Stainless steel sintered filter HM46670SP
Other Accessories
RTD temperature probe 5 m (16.4 ft) ASM210644SP
Hermetic door switch sensor kit 236319SP
Thermal dampener blocks 236310SP
Four Dual Lock™ strips (76 mm/3 in) 237217SP
1) See separate order form.

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