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Thermatel® TD1 switch can easily be adjusted to detect flow (gases and liquids), level or liquid-liquid interface. 

The TD1 is a 24 V DC line powered unit with integral electronics and a built-in DPDT relay. 

With continuous diagnostics, automatic temperature compensation, narrow hysteresis and fast response time, the TD1 brings you the latest in thermal dispersion technology.
Features
  • Easy field calibration – pre-calibration from factory at request.
  • Variable flow or Flow/No flow detection of gases and liquids.
  • Excellent low flow sensitivity.
  • Automatic temperature compensation for repeatable alarm under varying process temperatures.
  • Continuous diagnostics detect sensor fault.
  • Continuous monitoring of flow rate versus setpoint via
  • LED (TD2).
  • mA output provides repeatable indication of flow rate and fault detection (TD2).
  • Flow can be measured over test points (TD2).
  • Optional retractable fitting for dismantling under process conditions.
  • Process conditions up to +450 °C (+850 °F) and 414 bar (6000 psi).
  • Integral or remote electronics up to 150 m (500 ft).
  • Unique spherical tip design option ideal for liquids or high viscosity applications.
  • Suited for SIL1 and SIL2 loops (full FMEDA report available).

1 - 4 of 4 Part Numbers
TD1-2D00-030
TD1-2D00-030
  • Agency Approvals - General-Purpose, FM/CSA Explosion-Proof Approved
  • Conduit Connection - Aluminum A356 - 3/4" NPT (Dual Entry)
TD1-2D00-031
TD1-2D00-031
  • Agency Approvals - General-Purpose, FM/CSA Explosion-Proof Approved
  • Conduit Connection - Aluminum A356 - M20 (Dual Entry)
TD1-2D00-0C0
TD1-2D00-0C0
  • Agency Approvals - ATEX/IECEx Ex d + ib, Zone 0 - Flameproof
  • Conduit Connection - Aluminum A356 - 3/4" NPT (Dual Entry)
TD1-2D00-0C1
TD1-2D00-0C1
  • Agency Approvals - ATEX/IECEx Ex d + ib, Zone 0 - Flameproof
  • Conduit Connection - Aluminum A356 - M20 (Dual Entry)
1 - 4 of 4 Part Numbers

Specifications

Brand

Approvals & Certifications

  • ATEX
  • CCOE
  • CE
  • CSA Explosion-proof
  • FM - Flameproof. Class I, Div. 1, Groups B, C, D, Temperature Codes: T2D (Ta=75° C), T3 (Ta=65° C), Class I, Zone 1, AEx d IIB + H₂, Typical 4/IP55
  • IEC
  • INMETRO
  • RosTech, FSTS

Conduit Connection

  • 1/2” NPT
  • 3/4” NPT
  • M20

Cover - for Local Enclosure

  • Blind Cover - Flameproof
  • Glass Lens Cover - Flameproof

Electronics - Standard Features

  • Continuous Diagnostics Detect Sensor Fault
  • Detects Min. Flow or Presence / Absence of Flow
  • Easy / Fast Calibration
  • Excellent Low Flow Sensitivity
  • Hygienic Design Available
  • Non-Linear mA Output Signal Can be used for Trending, Diagnostics & Repeatable Flow/level Indication
  • Temperature Compensation

Enclosure, Body Material

  • 304 Stainless Steel
  • 316 Stainless Steel
  • Cast Aluminum A356 Containing less than 0.2 % Copper

Flange Material

  • 316 Stainless Steel
  • 316L Stainless Steel
  • Hastelloy C
  • Monel

Input Power

  • 19.2-28.8 Vdc 50/60 Hz
  • Power Consumption: 3.5 W at 24 Vdc
  • Power Consumption: 4.5 W at 30 Vdc

Insertion 'U' Length

  • Custom 'U' Lengths: 2” to 130” (5 cm to 330 cm) in 1” (2.5 cm) Increments

Operating Pressure - Sensor

  • Maximum

Operating Temperature - Electronics

  • -40° to 70° C (-40° to 158° F)

Operating Temperature - Sensor

  • -73° to 454° C (-100° to 850° F)
  • Extended Range: -73° to 454° C (-100° to 850° F)

Options

  • LED Indication of Flow/Level
  • Remote

Principle of Operation

  • Thermal, Calorimetric

Response Time

  • 1 to 10 seconds (Typical - Dependant Upon Sensor Type, Application, & Set Point Adjustment)

Sensor, Probe Style

  • Insertion

Switch Point Range

  • Air: 0.1 to 500 FPS (0.03 to 150 mps)
  • Water: 0.01 to 5.0 FPS (0.003 to 1.5 mps) (spherical Tip & Twin Tip Sensors)

Switch Type

  • DPDT Switch: 8 Amp at 120 Vac, 250 Vac / 8 Amp at 30 Vdc, 0.5 Amp at 125 Vdc / Hermetically Sealed 1 Amp at 28 Vdc, 0.5 Amp at 125 Vdc

Wetted Materials

  • 316, 316L Stainless Steel
  • Hastelloy C
  • Monel
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