CTE is a unique manufacturer of quality flow monitors, excess flow valves and flow meters. We are dedicated to providing products and services which exceed our customers' needs and expectations.

Non-Adjustable Flow Monitors

FLOW MONITORS-LPH SERIES

For economical monitoring of flows of corrosive and non-corrosive liquids and gases.

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LPH SERIES
Key Features
Compact Size, Most Economical
 
Applications
Analyzers Kidney Dialysis Machines Micro Biomedical Machines Laser Cooling Systems Bubbler Systems Pollution Sampling Equipment
 
Features
Close On-Off Differential
Visual Indication of Flow with Acrylic Model
No Seals
In Line Vertical Plumbing
Materials: Acrylic, Brass Teflon, or 316ss
Confirms: Normal Flow Conditions
Senses: High flow or Low flow conditions
Output: Switch Contact

Operation

As flow is established upward through the unit and continues to increase, the pressure differential across the grooved magnetic piston increases until it overcomes the small piston's resistance (mass). The force causes it to progress fully upward which actuates the dry reed switch. This is a snap action and occurs in the decreasing mode as well.
LPH SERIES
Actuation points for air at 68° F and 14.7 PSIA with increasing flow.
Deactuation (decreasing flow) averages 10% less than actuation (increasing flow).
Flow Setting accuracy ± 10% of actuation points shown
Repeatability ± 2%
Unit will pass greater flows.
Teflon encapsulated piston not available in 375-4 or -5
   
Calibration Range
MODEL AIR SCC/M (SCFH) WATER ML/M (GPH) PORTS
FNPT
LPH-125-0 50 (0.105) 1 (.016) 1/8"
-1 120 (0.254) 2 (.03171)  
-2 560 (1.187) 16 (.25369)  
-3 750 (1.589) 30 (.47567)  
-4 1300 (2.755) 45 (.71350)  
-5 1400 (2.966) 50 (.79278)  
-6 1900 (4.026) 65 (1.0306)  
-7 2500 (5.297) 85 (1.3477)  
-8 2700 (5.721) 90 (1.4270)  
-9 3300 (6.992) 105 (1.6648)  
-10 3600 (7.628) 120 (1.9027)  
-11 5200 (11.02) 170 (2.6955)  
-12 6000 (12.71) 200 (3.1711)  
LPH-250-1 350 (0.742) 7 (0.111) 1/8 "
-2 6000 (12.71) 200 (3.171)  
-3 7500 (15.89) 250 (3.964)  
-4 9500 (20.12) 315 (4.994)  
-5 10500 (22.25) 346 (5.486)  
-6 12500 (26.49) 400 (6.342)  
-7 15200 (32.21) 500 (7.928)  
-8 24000 (50.85) 760 (12.05)  
LPH-375-1 3000 (6.36) 70 (1.110) 1/4"
-2 15200 (32.21) 475 (7.531)  
-3 30300 (64.20) 950 (15.06)  
-4 37000 (78.40) 1425 22.59)**  
-5 45300 (95.99) 2200 (34.88)**  
PRESSURE LOSS TABLE
DP AT SET POINT MBARS (INCHES OF WATER)
ALL UNITS 11.2 (4.5)
Corrections must be used for other liquids, line pressures and temperatures. Please consult your representative of the factory.
   
Switch Data
SPST
Hermetically Sealed Reed Switch
SPDT
SPDT is not recommended for A/C
Max Switching Voltage DC (V) 200 AC (V) 150
Max Switching Voltage DC (V) 100
Contact Rating DC (W) 50 AC (VA) 70
Contact Rating DC (W) 3
Max. Switching Current DC (A) 1.0 AC (A) 0.7
Max. Switching Current DC (A) .25
Leads
SPST
Leads 18 in. min. from body 22 AWG, TFE insulation.
SPDT (optional) Leads 18 in. min. from body 24 AWG, TFE insulation.
  • green - N.C.
  • blue - N.O.
  • white - Common
Above values for resistive loads only. For inductive loads, surge current and rush current contact protection is required; consult your local representative. SPDT unit not UL Recognized.
 
Specifications
Unit
Weight Lbs (Kg)
Max. Working Pressure PSIG (BARG)
Seals
Acrylic
4 (113.4)
100 (6.89)
Acrylic, 316ss, Epoxy
Brass
8 (226.8)
1500 (103.42)
Brass, 316ss, Epoxy
316ss
8 (226.8)
3000 (206.84)
316ss, Epoxy
Teflon
4 (113.4)
80 (5.52)
Teflon®
 
Fluid Ports: Shown in Calibration Table
Electrical Conduit Optional: 1/2" FNPT (Metallic Bodies Only)
Temperature Operating Range: 32° to 220° F (0° to 104°C) for 316ss, Brass & TFE. 32° to 160° F (0° to 71° C) for Acrylic. For other temperature ranges, consult factory.
Installation: Mount with the inlet port down vertically. A 10 micron filter is recommended.
Leads Up - Normally Open
Leads Down - Normally Closed
Conduit: N.O.: Conduit Offset Down
N.C.: Conduit Offset Up
Download Specifications Installation Maintenance
 
 
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