Model 174 Industrial Liquid Level Instrument

***Note: The Model 174 has been Replaced by the Model 175***

Model 174 Industrial Cryogenic Level Transmitter

The American Magnetics, Inc. (AMI) Model 174 Liquid Level Transmitter system is a ruggedized version of AMI's line of capacitance-based level instrumentation. The Model 174 is designed for use in industrial environments and utilizes a NEMA 4 enclosure for maximum protection from external environmental conditions.

Capacitance-based level sensing

Simple Calibration

In contrast to competitor's systems in the industrial applications market, the Model 174 provides simple microprocessor-controlled calibration. Simply press the MIN and MAX buttons to set the zero and span for any installed sensor. No tedious potentiometer adjustments are required for calibration. Calibration values are stored in non-volatile memory.

Remote monitoring

The Model 174 is provided with a 4-20 mA output which corresponds to 0-100% liquid level.

Specifications
Input voltage:	14 - 32 VDC
Dimensions:	4.75" H x 5.25" W x 5.7" D
Weight:	4.5 lbs.
Operating environment:	0 - 60°C

4-20 mA Output Specifications @ V_in = 24 VDC and 25° C
Integral non-linearity:	ą 0.012%
Resolution:	16 bits
Total error:	ą 0.5%
Current drift (4-20 mA):	75 ppm/°C
PSRR:	10 ľA/V
Output compliance:	V_in - 5.5 V

Watchdog timer circuitry and low line voltage (brownout) detector prevent microprocessor lock-up and provide fail-safe operation.

Model 174 Liquid Level Transmitter Manual in Acrobat 3.0 format

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