Teledyne 4250, Installation And Operation Manual, Page: 22 / 204

4250 Flow Meter
Section 1 Introduction
1-10
Table 1-3 Technical Specifications for the Standard AV Sensor
Weight Standard Range
Extended Range
2.1 lbs (.96 kg)
3.9 lbs (1.8 kg)
Sensor Dimensions Length: 6.6 inches (6.8 cm)
Width: 1.6 inches (4.1 cm)
Height: 1.2 inches (3.0 cm)
Nose Angle 35° from horizontal
Cable Length Standard Range
Extended Range 25 ft (7.6 m)
50 ft (15.2 m)
Materials Sensor: Polybutadiene-based polyurethane, stainless-steel
Cable: Polyvinyl chloride (PVC) chlorinated polyvinyl chloride (CPVC)
Operating Temperature 32° to 160°F (0° to 71°C)
Level Measurement Method Submerged pressure transducer mounted in the flow stream
Transducer Type Differential linear integrated circuit pressure transducer
Level Measurement Range
Standard Range
Extended Range 0.05 to 10.0 ft (0.015 to 3.05 m)
0.05 to 30.0 ft (0.015 to 9.14 m)
Maximum Allowable level
Standard Range
Extended Range 20 ft (6.1 m)
40 ft (12.2 m)
Level Measurement Accuracy
Standard Range
Extended Range
0.033 to 5.0 ft: ± 0.008 ft/ft (0.01 to 1.52 m: ± 0.008 m/m)
>5.0 ft: ± 0.012 ft/ft (>1.52 m: ± 0.012 m/m)
0.05 to 15.0 ft: ± 0.03 ft (0.015 to 4.57 m: ± 0.009 m)
0.05 to 21.0 ft: ± 0.09 ft (0.015 to 6.40 m: ± 0.027 m)
0.05 to 30.0 ft: ± 0.30 ft (0.015 to 9.14 m: ± 0.090 m)
@77°F (25°C). Includes non-linearity, repeatability, and hysteresis. Does
not include temperature coefficient.
Compensated Temperature Range 32° to 100°F (0° to 38°C)
Temperature Coefficient
Standard Range
Extended Range
0.05 to 4.0 ft: ± 0.005 ft/°F (0.015 to 1.22 m: ± 0.0027 m/°C)
4.0 to 10.0 ft: ± 0.007 ft/°F (1.22 to 3.05 m: ± 0.0038 m/°C)
0.05 to 30.0 ft: ± 0.008 ft/°F (0.015 to 9.14 m: ± 0.0044 m/°C)
Maximum error over compensated temperature range, per degree of tem-
perature change.
Velocity Measurement Method Doppler Ultrasonic
Frequency 500 kHz
Typical minimum depth for velocity
measurement 0.25 ft (75 mm)
Range -5 to +20 ft/s (-1.5 to +6.1 m/s)