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Vatell AMP-6

Sensor Amplifier for HFM 6+7s with rechargeable batteries + 5 gain settings

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Key Features
  • Dual channel amplfier
  • Lemo connectors to match HFM heat flux sensor
  • Supports HFM6 and HFM7
  • Battery powered or 18V DC
  • Supports RTS temperature channel
  • HFS gain range 1 to 5000
  • RTS gain range 1 to 500

For use with HFM-6 and HFM-7's, Rechargeable Battery, User Adjustable Gain


  • Isolated from power lines to eliminate ground loops
  • Captures the full range and bandwidth of heat flux signals
  • Powered by long life 9-Volt Nickel-Cadmium cells
  • 12 hours of operation on one battery charge
  • Input cables and battery chargers included

Principle of Operation

The AMP-6 Signal Conditioning Amplifier is designed for use with the HFM series. Heat Flux signals of the transducer are amplified by a low noise, wide-band differential amplifier whose gain may be set at one of five discrete values between 1 and 5000. The Resistance Temperature Sensor (RTS) is driven by a constant current of 100 mA. The resulting voltage is amplified by a low noise differential amplifier whose gain may be set at one of four discrete values between 1 and 500.


All signal connections are at the rear panel of the amplifier. A four-pin female Lemo connector is provided for leads from the Heat Flux Microsensor. Male connectors are provided for amplified heat flux and temperature output signals. Batteries are recharged using a NiCd charger. The amplifier has a power switch on the front panel. Gains for heat flux and temperature signals are selected by multiple position switches. Ten-turn potentiometers are provided for screwdriver adjustment of the heat flux amplifieroffset and setting of the temperature reference point. A battery test switch, state of charge, and charging indicator allow checking of the battery state and monitoring of the recharge process.


  • Height: 1.7 inches
  • Width: 7.5 inches
  • Depth: 11 inches
  • Weight: 46oz
  Heat Flux Channels Temperature (RTS) Channel
Gain Settings 1, 100, 500, 1000, 5000 1, 100, 200, 500
Gain Accuracy (%)    
Gain = 1 ±0.6% ±0.6%
Gain = 100 ±1.5% ±1.5%
Gain = 200, 500 ±1.5% ±1.5%
Gain = 1000 ±2.1%  
Gain = 5000 ±3.6%  
Gain = 1 1 MHz 1 MHz
Gain = 100 150 kHz 150 kHz
Gain = 200   100 kHz
Gain = 500 50 kHz 50 kHz
Gain = 1000 25 kHz  
Gain = 5000 5 kHz  
Input Impedance 1000 MOhms 1000 MOhms
Input Noise 0.2 µV 0.2 µV
Full Scale Output 6 Volts 6 Volts


What's in the box?

  • AMP-6
  • 2m Extension cable, 4 pin male Lemo connector on each end
  • 18V, 300mA power supply. 100-240V 50/60Hz input. Supplied with UK, US and Euro face plates. Strontronics T5133ST or similar
  • Adjustment screwdriver
  • Calibration certificate
  • AMP6 Front Right View
    AMP6 Front Right View
  • AMP6 Front Left View
    AMP6 Front Left View
  • AMP6 Back Left View
    AMP6 Back Left View
  • AMP6 Back Right View
    AMP6 Back Right View
  • AMP Extension Cable and Screwdriver
    AMP Extension Cable and Screwdriver
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