Wireless Temperature Transmitter – Maltec-T MTW1

Features

  • Universal Sensor Input
    Resistance thermometers, thermocouples and DC voltage sources
  • Up to 4km or 2km distance (LOS)
    Transmission up to 4km distance (LOS) 868 MHZ
    Transmission up to 2km distance (LOS) 2.4 GHZ
  • Real Time Transmission
    Process and ambient temperature, RF signal strength and battery status
  • Ultra-low Power Mode
    Long battery Life
  • Wide Supply Voltage Range
    5 to 24V DC
  • Compact Design
    DIN Form B connection head mounting
Enquiry
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Dpstar Group is the largest manufacturer of thermocouples based in Malaysia. We design and manufacture a complete line of high-quality standard and custom temperature sensors including thermocouples, RTD’s, thermowells, and float switches as well as a wide selection of temperature accessories. Through our engineering capabilities and 30 years of experience, our trademark brand Maltec-T is the only CE-certified manufacturer for thermocouples in Malaysia. With extensive experience, unique technology, and hard commitment, we become one of the best quality suppliers in the temperature sensors field. We offer a full range of design services to provide you with the benefit of our knowledge and experience.

The Universal Wireless Temperature Transmitter MTW1 is specifically designed to meet the most rigorous requirements of operation in the industrial process environments. Due to its reduced dimensions, it may be installed in the DIN Form B sensor connection head, in place of the traditional terminal blocks or current loop temperature transmitter. In its high RF power mode, it can communicate over a long distance range (up to 4 km line of sight). It accepts the most commonly used temperature sensors.

Dimensional Drawings

Electrical Connections

LED Indication In Connection & Configuration

Specification

Input Resistance Thermometer (RTD)
Measured variable Temperature
Sensor type PT100, PT500, PT1000
Units ºC or ºF
Connection 1 Resistance thermometer (RTD) in 2-wire, 3-wire or 4-wire system
Sensor current <0.05 mA (50µA)
Response time <500 ms
Open-circuit monitoring Always active (cannot be disabled)
Short-circuit monitoring Always active (cannot be disabled)
Measuring range See “Digital measuring accuracy thermometer” table
Input Thermocouples (TC)
Measured variable Temperature
Sensor type  E, J, K, N ,R ,S, T
Units ºC or ºF
Connection 1 Thermocouple
Sensor current <0.05 mA (50µA)
Response time <500 ms
Open-circuit monitoring Always active (cannot be disabled)
Short-circuit monitoring Not available
Cold junction compensation (CJC) Integrated resistance thermometer
Measuring range See “Digital measuring accuracy thermocouples” table
RADIO SPECIFICATIONS 868 MHZ 2,4 GHZ
Range¹ Up to 4km LoS, 27 dBm (500mW) Up to 2km LoS, 10 dBm (10mW)
Frequency band 868 to 870 MHz² 2,4 to 2,5 GHz²
Number of channels 16 16
Reception sensitivity 97 to -109 dBm² 91 to -108 dBm²
Transmit power 0 to 27 dBm² -10 to 18 dBm²
Communication period Adjustable from 1 second to 24h
Output (RF Transmission)
Output signals
Sensor value (Temperature / mV) Temperature ºC (ºF) / mV
Internal Temperature Temperature ºC (ºF)
RSSI Absolute value
Power supply voltage Voltage V
Configurable parameters Sensor type, Communication period
OPERATING ENVIRONMENT 868 MHZ 2.4 GHZ
Ambient temperature range -40 to 80 ºC (-40 to 176 ºF) -20 to 80 ºC (-4 to 176 ºF)
Storage temperature range -40 to 80 ºC (-40 to 176 ºF) -20 to 80 ºC (-4 to 176 ºF)
Relative humidity ≤ 95 %, without condensation ≤ 95 %, without condensation
Power Supply
Voltage Range 5 to 24 V DC
Measurement accuracy ± 100mV
Power consumption (sleep) < 0,2 mA
Battery Life For a 9V battery, with 1200 mAh with a transmission interval of 2 minutes, the battery life is higher than 2 years
Casing
Material Nylon 66
Weight Approx. 50g
Dimensions See “Dimensional drawings”
Cross section 2.5 mm
Protection type IP40
Factory Default Settings
Sensor Thermocouple K
Measuring range 0…100ºC (32…212ºF)
Transmission interval 300s
Wireless transmitter ID 0
Wireless network ID 0
Certifications And Approvals
EN 61326 Electrical equipment for measurement, control and laboratory use. EMC requirements
IEC 61000-4-2 Electrostatic discharge immunity test
IEC 61000-4-3 Radiated, radio-frequency, electromagnetic filed immunity test
IEC 61000-4-4 Electrical fast transient/burst/immunity test
IEC 061000-4-5 Surge immunity test
EN 300 228 Electromagnetic compatibility and Radio spectrum Matters (ERM); Wideband transmission systems; Data transmission equipment operating in the 2,4 GHz ISM band and using wide band modulation techniques; Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive
EN 300 440 Electromagnetic compatibility and Radio spectrum Matters (ERM); Short Range Devices; Radio equipment to be used in the 1 GHz to 40 GHz frequency range; Part 2: Harmonized EN under article 3.2 of the R&TTE Directive

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