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This transmitter amplifies a signal from a RTD or linear resistance, and it turns the signal into a current which increases from 4 to 20 milliamperes as the temperature or input signal increases. This industry-standard 4-20mA signal travels thousands of feet over a pair of wires, ignoring electrical interference and bringing the temperature, accurately, into your computer or controller. Drawing power directly from the signal line, only 2 wires are needed for power and signal.
  • RTD or Ohm input
  • Accurate, Stable 4–20mA Output
  • PC and field-programmable
  • FM Approved Intrinsically Safe
Converts multiple inputs
Temperature measurement can be done with one of several RTD’s: 100 Ω, 1000 Ω platinum, 100 Ω Nickel and 1000 Ω Nickel. Because amplification and conversion of the input signal is performed within a few feet of the sensor, electrical interference in noisy environments is eliminated. The transmitter can be mounted at the field location in a standard DIN form B head or on a DIN rail inside a local box.
General Specifications
Supply Voltage 8-30 VDC
Warm-Up Time 5 min.
Communication Interface PC Interface/Loop Link
Signal/noise ratio Min. 60 dB
Response Time (programmable) 0.33 sec. to 60 sec.
Update Time 135 msec
Calibration Temperature 20 to 28°C
Effect of supply voltage change < 0.005% of span/ VDC
EMC-lmmunity influence < ±0.5% of span
Vibration IEC 600 68-2-6 Test FC
Lloyd's specification no. 1 4 g / 2 - 100 Hz
Max. wire size AWG14
Air Humidity 0-95% RH
Dimensions ∅1.73 x 0.84 in (∅44 x 20.2mm)
Tightness (enclosure/terminal) IP 68 / IP00
Option Description
TT518 Model Number: TT518 Temperature Transmitter
PD = Sensor Type 100 Ω Platinum RTD (0.00385)
Ranging 32 - 302°F
F = Display Units Farenheit
1 = Calibration Nominal
Z = Sensor Leads 3-lead RTD

Important Notes

  • Items marked as being in STOCK are usually available for shipment from one of our stocking locations.  The availability is subject to prior sale of the equipment in our inventory.
  • Standard delivery for non-stock items is 2-3 weeks from date of order.
  • If delivery time is of importance, please call our toll-free number 1-800-275-3181 for information.

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