Flowtechnik | variable area meter index | Flow rate transmitters
Flow rate transmitters

Ideal for batching, industrial process control, mobile hydraulic equipment and computer/PLC-controlled hydraulic system monitoring applications.
Simple to install: All transmitters are factory calibrated and ship fully assembled. Simply install the transmitter into your system and apply power.
Industry standard outputs: Transmitters provide proportional analog outputs of 4-20mA, 0-5 Vdc and 1-5 Vdc1, and 20-2000 Hz square-wave pulse. These outputs will drive popular data acquisition devices, meters and analog input cards.
Direct reading: All transmitters provide a visual indication of flow rate proportional to the transmitted output.
Weather-tight construction: The rugged cast aluminum NEMA type 4X enclosure allows installation in outdoor applications and in environments where liquid tight seals are required.
Rugged and reliable: Without delicate internal components to break, abrade or corrode, the Lake flow transmitter will provide many years of low-maintenance service.
Compatible with lake monitors R/T100 and R100 flow analyzers: The Lake flow rate transmitter combines with these Lake analyzers to make a powerful flow instrument capable of remote monitoring of rate and total flows.

1The 1-5Vdc output requires an external 249 ohm resistor (not included with transmitter) to be wired at the receiving device.

Flow Transmitter Engineering specifications:

The in-line Flow Rate Monitor/Transmitter Shall:
• Be factory calibrated for 4-20mA, 0-5Vdc, 1-5Vdc, and square wave pulse outputs
• Use the variable annular orifice technique with compression spring recoil
• Not require inlet or outlet straight plumbing, or require vertical orientation
• Have a measuring accuracy of ±2.5% of full scale in the center third of the measuring range, and ±4% in upper and lower thirds
• Have a stainless steel sharp-edged orifice
• Have a maximum working pressure rating of 3500 or 6000 PSIG for liquids
• Have a maximum working pressure rating of 600 or 1000 PSIG for gasses
• Have a weather-tight external construction
• Be Lake Monitors No. R _ _ – _ _ _ – _ _

Flow Transmitter Materials of Construction (Wetted Components)
 
Aluminum
Brass
Stainless steel
High-pressure casing, end ports and tapered shaft
Aluminum
Brass
303 Stainless steel
Seals
Buna-N (STD), EPR, Viton or Kalrez
Buna-N (STD), EPR, Viton or Kalrez
Viton® with Teflon® backup (STD.), Buna-N,
EPR or Kalrez
Transfer Magnet
Teflon coated Alnico
Teflon coated Alnico
Teflon coated Alnico
Floating Orifice disk
Stainless Steel
Stainless Steel
Stainless Steel
All other internal parts
Stainless Steel
Stainless Steel
Stainless Steel


Materials of Construction (Non-Wetted Components)
 
Aluminum
Brass
Stainless Steel
Enclosure & Cover
Aluminum
Aluminum
Aluminum
Seals
Buna-N
Buna-N
Buna-N
Window
Pyrex
Pyrex
Pyrex
Din connector
Polyamide
Polyamide
Polyamide


Meter Performance
Measuring accuracy ±2.5% of full-scale in the center third of the measuring range; ±4% in upper and lower thirds
Repeatability ±1% of full-scale
Flow measuring range 0.05-150 GPM (0.2-560 LPM); 1.5-1300, SCFM (0.75-610 SLPS)
Maximum operating pressure aluminum and brass meters: 3500 PSIG (240 Bar)
stainless steel meters: 6000 PSIG (410 Bar)
Maximum operating temperature media: 240°F (116°C), ambient: 180°F (82°C)
Standard calibration fluids Oil meters: DTE 25® @ 110°F (43°C), 0.873 sg
Water metes: tap water @ 70°F (21°C), 1.0 sg
Air meters: air @ 70°F (21°C), 1.0 sg and 100 PSIG (6.8 Bar)
Filtration requirements 74 micron filter or 200 mesh screen minimum


Electronic Transmitter Performance
Power requirements 12-35 Vdc
Load driving capacity 4-20mA: Load resistance is dependent on power supply voltage. Use the following equation to calculate maximum load resistance:
Max Loop Load (Ω) = 50(Power supply volts - 12).
0-5 VDC: Minimum load resistance 1000 Ω
1-5 VDC: Minimum load resistance 25 K Ω
Square Wave Pulse: Minimum load resistance 1000 Ω
Transmission distance 4-20mA and 1-5 VDC are limited only by wire resistance and power supply voltage.
<200 feet recommended for 0-5 VDC and square wave pulse
Over-current protection self limiting at 35mA
Resolution 10 bit (0.1%)
Isolation Inherently isolated from the process
Response time <100 milliseconds


Mechanical size code
DIM
Series 3
Series 4
Series 5
Series 5
A
6-9/16" (167mm)
7-5/32" (182mm)
10-1/8" (258mm)
12-5/8" (322mm)
B
2-3/16" (56mm)
2-15/16" (75mm)
3-13/16" (97mm)
3-13/16" (97mm)
C
4" (101mm)
4-1/2" (114mm)
5-5/16" (135mm)
5-5/16" (135mm)
D
1-7/8" (47mm)
1-7/8" (47mm)
1-7/8" (47mm)
1-7/8" (47mm)
E
4-7/8" (128mm)
5" (127mm)
6-3/4" (172mm)
6-3/4" (172mm)
F
2-1/4" (57mm)
2-7/8" (73mm)
3-3/4" (95mm)
3-3/4" (95mm)
Port Size
NPTF: 1/4", 3/8", 1/2"
SAE: #6, #8, #10
BSP: 3/8", 1/2"
NPTF: 3/4", 1"
SAE: #12, #16,
BSP: 3/4", 1"
NPTF: 1-1/4", 1-1/2"
SAE: #20, #24
BSP: 1-1/4", 1-1/2"
NPTF: 2"
SAE: #32
BSP: 2"

 

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