R-812 Series

The NewTek R-812 Series AC LVDTs satisfy numerous applications in which LVDT performance and reliability are required. These linear displacement sensors are available in ranges of ±0.50 inch (±1.27mm) to ±10 inches. Sensor construction consists of a coil assembly potted and mechanically swaged into a 0.812 inch (20.6mm) diameter housing with a separate moving core. The 0.812 inch (6.35mm) diameter core allows a radial clearance of 1/16 inch (1.58mm) between the movable core and the bore of the coil assembly. The large core-to- bore radial clearance provides for ample installation misalignments. The R-812 Series can be designed with a number of standard options including mild radiation resistance, Teflon bore, metric threaded core and high temperature (400°F).

Input Voltage:                                3 Vrms (Nominal)
Input Frequency:                            400Hz to 10KHz
Linearity:                                        < ± 0.15% Full Range Typical
Extended Operating Range:          1.5 X Linear Range
Null Voltage:                                  0.5% Full Range
Hysteresis:                                     <0.01% of Full Range Typical
Repeatability:                                <0.01% of Full Range Typical

Operating Temperature:          -65° F to 275° F (-55° C to 135° C)
Thermal Coefficient:                <-0.01%/°F (< -0.02%/°C) of Full Range
Humidity:                                  90% R.H., 240 Hours
Shock Survival:                         1000 g, 11 ms
Vibration:                                  20 g to 2 KHz

Housing:             Corrosion-resistant stainless steel
Core:                   Hi-permeability nickel-iron alloy
Coil Form:          Ceramic/Plastic
Magnet Wire:    Film insulated copper
Lead Wires:       #28 AWG Teflon insulated, 12″ long


  • Rugged .812 inch stainless steel housing
  • Measurement ranges from ± 0.05 to ± 10 inches
  • Linearity ±0.15% of Full Range Typical
  • Shock and vibration tolerant
  • Wide operating temperature range (-65°F to 275°F)
  • Choice of imperial or metric threaded core
  • Standard and custom models available


  • Factory Automation
  • Food process control
  • Materials testing
  • Fluid level measurement


Dimensions & Wiring



NewTek products are warrantied against defective materials and workmanship for a period of one (1) year from the date of delivery to the original purchaser. NewTek accepts no liability for damages in the misuse of our products.

NT-R-812 Accessories

NTC-6000 Signal Conditioner

LVDT Mounting Blocks

Core Rod Kits

Contact NewTek Sensors to discuss your requirements