signal preamplifier / for flow sensors
for flow sensors
Turbine flow meters provide remote readings; however, noisy environments can cause erroneous or false readings at the remote terminals. The easily-installed NUFLO LP-A low power preamplifier helps solve the problem of noise when shielded signal cables cannot effectively eliminate them. Electrical noise can cause erroneous readings when the noise level equals or exceeds the meter output signal amplitude, which generally is very low (in millivolts). The remote reading unit might also record noise as signal output when the flow meter is not transmitting.
The NUFLO LP-A low power preamplifier raises the turbine flow meter signal level at the metering point to a relatively high level signal (six to eight volts). Thus, the receiver can discriminate between signal and noise and register only true signals at the remote location. The flow meter transmits its low level signal through a pair of conductors to a remote reading unit. Shielded signal cables can help keep noise out of this system or reduce the noise level. However, a high noise level or the length of the transmission cable can make shielding ineffective. The NUFLO LP-A low power preamplifier helps eliminate noise problems in these instances.