Intrinsically Safe 4-20mA Dewpoint Transmitter

Delta Instrument AMT-EX

3-wire 4-20mA transmitter, used for continuous measurement of humidity in dry process gases or dry compressed air.

Intrinsically Safe 4-20mA Dewpoint Transmitter
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  • Specification
  • Application
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Model AMT Intrinsically Safe 4-20mA Dewpoint Transmitter

4-20mA. Ranges available between -184°F to +68°F (-120°C to +20°C)

Model AMT-Ex Dew-point Transmitter is a 3-wire 4-20mA transmitter, used for continuous measurement of humidity in dry process gases or dry compressed air. The Model AMT-Ex transmitter can also be factory configured to output a linear 4-20mA signal for any other moisture unit e.g. ppm(v), ppm(w), g/m3 and lb/MMSCF etc.

  • Fast Response.
  • Low Cost Solution.
  • Simple to Install and set up.
  • Reliable.
  • Accurate.
  • Stable results

The long lasting sensing element offers excellent sensitivity, repeatability and speed of response. Each unit is supplied with a Certificate of Calibration, traceable to International Humidity Standards.

  • 3 Wire Intrinsically Safe Dewpoint Transmitter.
  • II 1GD Ex ia IIC T4 Ex iaD 20 T135°C (-20°C ≤ Ta ≤ +60°C).
  • Overall Range: –184°F to +68°F Dewpoint.
  • Accuracy ±3.6°F (±2°C) Dewpoint.
  • INTEGRATED AUTOMATIC CALIBRATION.
  • Can be configured for Linear 4-20mA signal in: °F & °C Dewpoint, ppm(v), g/m3, lb/MMSCF.
  • Fault Diagnostics.
  • Long Term Stability.
  • Fast Response time.
  • NEMA4X (IP66) Protection.

Isolation IllustrationModel AMT-Ex is ATEX certified and provides an Intrinsically Safe Dew Point Transmitter for hazardous area use when installed with the appropriate isolator. See Illustration opposite and additional information below.

This online dew point transmitter also incorporates an Automatic Calibration (AUTOCAL) feature that allows the user to carry out a field calibration / span check. The AUTOCAL feature is operated by two small button switches built within the transmitter enclosure.

The integral RISC microprocessor circuitry of the Model AMT-Ex transmitter allows high resolution with advanced self diagnostics for fault conditions. It also enables periodic re-calibration of the moisture sensor, storing calibration data within the fully self contained unit. The mechanics of the Model AMT-Ex transmitter have been designed to cope with extreme environmental conditions. The rugged stainless steel construction offers protection to NEMA4X (IP66), with the transmitter electrical connections made via a secure industrial connector.

Model AMT-Ex transmitter can withstand 5076PSI (350bar) maximum pressure and by employing a low resistance cable, the transmitter can be located at significant distances in excess of 0.62mile (1000 metres) from the control room.

The Model AMT-Ex transmitter is supplied with a Certificate of Calibration, an instruction manual and 6.6ft (2m) connecting cable.

Intrinsically Safe 4-20mA Dewpoint Transmitter

MODEL AMT-Ex Dewpoint Transmitter

TRANSMITTER TYPE: 3 Wire, 4-20mA Loop Powered Transmitter,

OUTPUT SIGNAL: 4 to 20mA Linear with selectable engineering units,

OPERATING VOLTAGE: 12-28V dc. Reverse polarity protected.

SENSING ELEMENT: Ultra High Capacitance – Aluminium Oxide Type.

RANGES: See How options tab.

INTRINSIC SAFETY CERTIFICATION STANDARDS:
EN 60079-0:2006 EN 60079-11:2007 EN 61241-11:2005
Ex II 1GD Ex ia IIC T4 Ex iaD 20 T135°C (-20°C ≤ Ta ≤ +60°C).

AUTOCAL: Field calibration / Span check facility. Activated and operated via two button switches on the Transmitter body. Locked in normal operating mode to avoid tamper.

FACTORY CALIBRATION: Supplied with Certificate of Calibration traceable to NPL / NIST

ACCURACY: ±3.6°F (±2°C) dewpoint (NPL/NIST traceable for range -130°F to +68°F)

REPEATABILITY: Better than ±0.36°F (±0.2°C) dewpoint.

OPERATING TEMPERATURE: -4°F to +140°F (-20°C to +60°C).

STORAGE TEMPERATURE: -4°F to +158°F (-20°C to +70°C).

OPERATING PRESSURE: From 0.15PSI (0.01 barA) to Maximum 5076PSI (350 barA).

OPERATING HUMIDITY (External): Maximum – 95% RH Non-condensing.

SAMPLE FLOW RATE: Flow independent but ideally 2 to 5 litres per minute. Max: 25 litres/min.

CABLE TERMINATIONS: IP66 (NEMA4X) rated, size C, DIN EN 175301 connector at the Transmitter and other end terminated with bootlace ferrules.

CABLE: Supplied with 6.6ft (2m) IS (blue) standard cable. Nominal diameter 3.4mm, 92ohms/km at 68°F (20°C).

ELECTROMAGNETIC COMPATIBILITY (EMC): Complies BS EN 61326-1

WARM UP TIME: 10 seconds.

FAULT CONDITIONS:
Open Circuit : Output drives to 20.50mA
Short Circuit : Output drives to 20.75mA

ISOLATION: Sensing Element connected to the 4-20mA loop but isolated from Transmitter body.

TRANSMITTER ENCLOSURE: 316 Stainless steel body with size C, DIN EN 175301 connector.

SENSOR PROTECTION: 316 Sintered stainless steel filter – 50 micron

PROBE MATERIAL (WETTED PARTS): 316 Stainless Steel

WEATHERPROOF CLASSIFICATION: NEMA4X (IP66) when Connector mated to Transmitter.

MECHANICAL CONNECTION: 3/4” UNF (16tpi) with integral Viton “O” ring seal.

MECHANICAL WARRANTY: 24 months in case of faulty workmanship and defective parts.

  • Dewpoint or Trace Moisture in Gases.
  • Dewpoint or Trace Moisture in Dry Compressed Air.
  • Fluid bed dryers
  • Refrigerant dryers
  • Desiccant wheel dryers
  • Rotary wheel dryers
  • Turbine air intakes
  • Wind tunnels
  • HVAC applications
  • Cool stores
  • Air braking systems
  • Condensation alarms
  • Controlled atmosphere environments
  • Precision engineering applications
  • Heat treatment gases
  • Environmental chambers
  • Product drying
  • Ambient air monitoring
  • Gas turbine frost protection systems
  • Switchgear monitoring
The AMT Transmitter can be paired with the Model DS1200 if a Display is required. Click here for more details.

Model AMT-Ex + [XX] (XX=Range Code)

SR: -166°F to -4°F (-110°C to -20°C) dewpoint
PL: -148°F to +32°F (-100°C to 0°C) dewpoint
RD: -112°F to -4°F (-80°C to -20°C) dewpoint
GY: -112°F to +32°F (-80°C to 0°C) dewpoint
SD: -148°F to +68°F (-100°C to +20°C)dewpoint
LD: -184°F to +68°F (-120°C to +20°C)dewpoint
HD: -85°F to +68°F (-65°C to +20°C)dewpoint
SP: 1 to 1000 ppm(v) – – – – resolution = 1ppm
MP: 0.1 to 100.0 ppm(v) – – – – resolution = 0.1ppm
LP: 0.01 to 10.00 ppm(v) – – – – resolution = 0.01ppm
PB: 1 to 1000 ppb(v) – – – – resolution = 1ppb
HG: 0.01 to 10.00 g/m3 – – – – – resolution = 0.01g/m3
LG: 0.001 to 1.000 g/m3 – – – – – resolution = 0.001g/m3
LB: 0.1 to 100.0 lbs/MMSCF – resolution = 0.1 lbs/MMSCF
NOTE: ppm, ppb, g/m3 & lbs/MMSCF ranges are stated at atmospheric pressure. Model AMT-Ex Transmitter can be configured to provide corresponding ranges for operation at other constant pressure. This must be stated at time of order.

Isolator for the safe area

PR5104BB2A:Single Channel
PR5104BB2B:Dual Channel

Model AMT Intrinsically Safe 4-20mA Dewpoint Transmitter

4-20mA. Ranges available between -184°F to +68°F (-120°C to +20°C)

Model AMT-Ex Dew-point Transmitter is a 3-wire 4-20mA transmitter, used for continuous measurement of humidity in dry process gases or dry compressed air. The Model AMT-Ex transmitter can also be factory configured to output a linear 4-20mA signal for any other moisture unit e.g. ppm(v), ppm(w), g/m3 and lb/MMSCF etc.

  • Fast Response.
  • Low Cost Solution.
  • Simple to Install and set up.
  • Reliable.
  • Accurate.
  • Stable results

The long lasting sensing element offers excellent sensitivity, repeatability and speed of response. Each unit is supplied with a Certificate of Calibration, traceable to International Humidity Standards.

  • 3 Wire Intrinsically Safe Dewpoint Transmitter.
  • II 1GD Ex ia IIC T4 Ex iaD 20 T135°C (-20°C ≤ Ta ≤ +60°C).
  • Overall Range: –184°F to +68°F Dewpoint.
  • Accuracy ±3.6°F (±2°C) Dewpoint.
  • INTEGRATED AUTOMATIC CALIBRATION.
  • Can be configured for Linear 4-20mA signal in: °F & °C Dewpoint, ppm(v), g/m3, lb/MMSCF.
  • Fault Diagnostics.
  • Long Term Stability.
  • Fast Response time.
  • NEMA4X (IP66) Protection.

Isolation IllustrationModel AMT-Ex is ATEX certified and provides an Intrinsically Safe Dew Point Transmitter for hazardous area use when installed with the appropriate isolator. See Illustration opposite and additional information below.

This online dew point transmitter also incorporates an Automatic Calibration (AUTOCAL) feature that allows the user to carry out a field calibration / span check. The AUTOCAL feature is operated by two small button switches built within the transmitter enclosure.

The integral RISC microprocessor circuitry of the Model AMT-Ex transmitter allows high resolution with advanced self diagnostics for fault conditions. It also enables periodic re-calibration of the moisture sensor, storing calibration data within the fully self contained unit. The mechanics of the Model AMT-Ex transmitter have been designed to cope with extreme environmental conditions. The rugged stainless steel construction offers protection to NEMA4X (IP66), with the transmitter electrical connections made via a secure industrial connector.

Model AMT-Ex transmitter can withstand 5076PSI (350bar) maximum pressure and by employing a low resistance cable, the transmitter can be located at significant distances in excess of 0.62mile (1000 metres) from the control room.

The Model AMT-Ex transmitter is supplied with a Certificate of Calibration, an instruction manual and 6.6ft (2m) connecting cable.

Intrinsically Safe 4-20mA Dewpoint Transmitter

MODEL AMT-Ex Dewpoint Transmitter

TRANSMITTER TYPE: 3 Wire, 4-20mA Loop Powered Transmitter,

OUTPUT SIGNAL: 4 to 20mA Linear with selectable engineering units,

OPERATING VOLTAGE: 12-28V dc. Reverse polarity protected.

SENSING ELEMENT: Ultra High Capacitance – Aluminium Oxide Type.

RANGES: See How options tab.

INTRINSIC SAFETY CERTIFICATION STANDARDS:
EN 60079-0:2006 EN 60079-11:2007 EN 61241-11:2005
Ex II 1GD Ex ia IIC T4 Ex iaD 20 T135°C (-20°C ≤ Ta ≤ +60°C).

AUTOCAL: Field calibration / Span check facility. Activated and operated via two button switches on the Transmitter body. Locked in normal operating mode to avoid tamper.

FACTORY CALIBRATION: Supplied with Certificate of Calibration traceable to NPL / NIST

ACCURACY: ±3.6°F (±2°C) dewpoint (NPL/NIST traceable for range -130°F to +68°F)

REPEATABILITY: Better than ±0.36°F (±0.2°C) dewpoint.

OPERATING TEMPERATURE: -4°F to +140°F (-20°C to +60°C).

STORAGE TEMPERATURE: -4°F to +158°F (-20°C to +70°C).

OPERATING PRESSURE: From 0.15PSI (0.01 barA) to Maximum 5076PSI (350 barA).

OPERATING HUMIDITY (External): Maximum – 95% RH Non-condensing.

SAMPLE FLOW RATE: Flow independent but ideally 2 to 5 litres per minute. Max: 25 litres/min.

CABLE TERMINATIONS: IP66 (NEMA4X) rated, size C, DIN EN 175301 connector at the Transmitter and other end terminated with bootlace ferrules.

CABLE: Supplied with 6.6ft (2m) IS (blue) standard cable. Nominal diameter 3.4mm, 92ohms/km at 68°F (20°C).

ELECTROMAGNETIC COMPATIBILITY (EMC): Complies BS EN 61326-1

WARM UP TIME: 10 seconds.

FAULT CONDITIONS:
Open Circuit : Output drives to 20.50mA
Short Circuit : Output drives to 20.75mA

ISOLATION: Sensing Element connected to the 4-20mA loop but isolated from Transmitter body.

TRANSMITTER ENCLOSURE: 316 Stainless steel body with size C, DIN EN 175301 connector.

SENSOR PROTECTION: 316 Sintered stainless steel filter – 50 micron

PROBE MATERIAL (WETTED PARTS): 316 Stainless Steel

WEATHERPROOF CLASSIFICATION: NEMA4X (IP66) when Connector mated to Transmitter.

MECHANICAL CONNECTION: 3/4” UNF (16tpi) with integral Viton “O” ring seal.

MECHANICAL WARRANTY: 24 months in case of faulty workmanship and defective parts.

  • Dewpoint or Trace Moisture in Gases.
  • Dewpoint or Trace Moisture in Dry Compressed Air.
  • Fluid bed dryers
  • Refrigerant dryers
  • Desiccant wheel dryers
  • Rotary wheel dryers
  • Turbine air intakes
  • Wind tunnels
  • HVAC applications
  • Cool stores
  • Air braking systems
  • Condensation alarms
  • Controlled atmosphere environments
  • Precision engineering applications
  • Heat treatment gases
  • Environmental chambers
  • Product drying
  • Ambient air monitoring
  • Gas turbine frost protection systems
  • Switchgear monitoring
The AMT Transmitter can be paired with the Model DS1200 if a Display is required. Click here for more details.

Model AMT-Ex + [XX] (XX=Range Code)

SR: -166°F to -4°F (-110°C to -20°C) dewpoint
PL: -148°F to +32°F (-100°C to 0°C) dewpoint
RD: -112°F to -4°F (-80°C to -20°C) dewpoint
GY: -112°F to +32°F (-80°C to 0°C) dewpoint
SD: -148°F to +68°F (-100°C to +20°C)dewpoint
LD: -184°F to +68°F (-120°C to +20°C)dewpoint
HD: -85°F to +68°F (-65°C to +20°C)dewpoint
SP: 1 to 1000 ppm(v) – – – – resolution = 1ppm
MP: 0.1 to 100.0 ppm(v) – – – – resolution = 0.1ppm
LP: 0.01 to 10.00 ppm(v) – – – – resolution = 0.01ppm
PB: 1 to 1000 ppb(v) – – – – resolution = 1ppb
HG: 0.01 to 10.00 g/m3 – – – – – resolution = 0.01g/m3
LG: 0.001 to 1.000 g/m3 – – – – – resolution = 0.001g/m3
LB: 0.1 to 100.0 lbs/MMSCF – resolution = 0.1 lbs/MMSCF
NOTE: ppm, ppb, g/m3 & lbs/MMSCF ranges are stated at atmospheric pressure. Model AMT-Ex Transmitter can be configured to provide corresponding ranges for operation at other constant pressure. This must be stated at time of order.

Isolator for the safe area

PR5104BB2A:Single Channel
PR5104BB2B:Dual Channel