Vatell AMP-12

Sensor Amplifier for use with HFM8s - 5 gain settings

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Key Features
  • Battery powered to provide isolation from power
  • Captures the full range and bandwidth of heat flux
  • Powered by long life 9-Volt Nickel-Cadmium cells
  • 12 hours of operation on one battery charge
  • Input cable and battery charger included
Buy Online

We currently don't have any AMP-12 parts to order online. Please call +44(0)118 9769000 for further assistance

What's in the Box?

  • AMP-12 amplifier
  • Screwdriver for adjusting offset potentiometers
  • CD ROM containing documentation and heat flux calculator program "hfcomp"
  • 18V, 100mA universal power supply (Stontronics 3A-061WP18)
  • 2m heat flux sensor extension cable with 4 pin male Lemo connector on each end.

Shipping information:
This product is shipped in cardboard box, 33.5cm x 24cm x 11cm (LWH) weighing 2.0kg. Volumetric weight is 2.0kg

Place your order before 2pm to select next day delivery. In a hurry? pre 10:30am delivery also available.


For use with HFM-8 heat flux Sensors

Principle of Operation

The AMP-12 Signal Conditioning Amplifier is designed for use with the HFM-8 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.


All signal connections are at the rear panel of the amplifier. A four-pin female Lemo connector is provided for the connection from the Heat Flux Microsensor. The amplified heat flux and temperature outputs (single ended) are on BNC male connectors.

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 amplifier offset 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.

Dimensions of AMP-12

  • Height: 43mm
  • Width: 190mm
  • Depth: 280mm
  • Weight: 1.3Kg


Heat Flux Channel Temperature Channel
Gain Settings 1, 100, 500, 1000, 5000 1, 100, 200, 500, 1000
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% ±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 25kHz
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
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