The document describes the technical specifications for the Trumen Loss of Head (LOH) indicator, controller, and transmitter used in water treatment systems, which utilizes capacitance probes to measure differential water levels. It highlights features such as a digital display, maintenance-free operation, and various customizable configurations for materials and process connections. The device provides a 4-20mA output for remote indication, and is suitable for applications in effluent and water treatment plants.

1. LoH...ICT Approvals & Certifications:
Capacitance Head Level Sensor Type
Loss of Head Indicator, Controller,
and Transmitter
Technical Specification
Document
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Description
Trumen 'Loss of Head' Indicator is widely used in water treatment plants.
Two Probes (High Pressure and Low Pressure) form the active element of the system that
go within the Stilling Pipe from top and come in contact with material whose differential
level is to be measured. And measure the differential level of the loss of head with the help
of two capacitance probe and it shows the 4-20mA Output on indicator.
Features
• 5 Digt Digital Display
• Local as well as Remote Indication
• Provide 4-20mA Output
• Maintenance Free (No moving parts)
• In-Built Relays
FLOW
High Pressure Probe Head Low Pressure Probe Head
LoH Indicator
Order Code
Probe Unit
--ICT--
Rx
--Sensor--
Hxx
Tx
Rx
Sx
Ix
Wx
Px
Cx
Lxxxx
Indicator, Controller and Trasmitter have following fixed specifications
Power Supply : 80 to 260VAC 50/60Hz max power consumption is 5 Watts
Enclosure : Aluminum pressure die-casted windowed IP-65 with 3 Cable entried having PG-11 glands
Number of alarm and SPDT relay outputs R1 = 1 Realy, R2 = 2 Relays, R3 = 3 Relays
Sensor is always SS-304 coated with PTFE insulation, inactive length material is always SS-304
Sensor Process connection material is always SS-304 unless otherwise specified
Enclosure: HAN: Aluminum Non-Hazardous IP-66/68, HAX: Aluminum Flameproof IIa, IIb and IIc,
HSN: Stainless steel, HES: Specially designed enclosure as per customer requirement
Material Temperature (T1: max 80°C, T2: max 200°C, TS: Customer specified - Special designed )
Sensor rigid/flexible type, RD : Rigid Rod Sensor, RP : Flexible Rope Sensor for Solids (2/4mm),
RL: Flexible Rope Sensor for Liquids (2mm), RS : Specially designed sensor )
Sensing Surface Material (S6:SS-316, SL:SS-316L, ST: PTFE coated, SF: PFA coated, SS: Special surface)
Insulation type : I0: None, IP: Partly PTFE insulated, IT: Full PTFE insulated, IC: Partly ceramic insulated,
Stilling Well Material (W0: None, W4: SS-304, W6: SS-316, WL: SS-316-L, WS: special material)
Process Connection Type : (PB1: BSP 1", PB2: BSP 1 ½", PB4: BSP 1 ¼", PB5: BSP 2")
(PN1: NPT 1", PN2: NPT 1 ½", PN4: NPT 1 ¼", PN5: NPT 2")
(PT1: Triclover/Triclamp 1½", PT2: Triclover/Triclamp 2")(PCS: Special Process Connection)
(PFL: Flanged Type – description of flange - FL -at the end of order code)
Process Connection Material (C4: SS-304, C6: SS-316, CL: SS-316L, CS: Special material)
Insertion length (125mm to 3000mm)
Applications
• Differential Level Measurement
(LoH) in :-
- Effluent Treatment Plants
- Water Treatment Plants
• Detecting Clogging of the travelling
water screen
LoH Indicator
The Level Proportional Signal from High Pressure Probe & Low Pressure probe is
evaluated in the LoH indicator. Standard 4-20mA is available at the output of the LoH
controller for remote display of difference. The difference in water level is also
indicated by the built in digital display.
Trumen Technologies Pvt.Ltd.
Loss of Head
Channel Flow
LoH-ICT Loss of Head Indicator, Controller and Transmitter
39 Mangal Nagar, Behind Sai Ram Plaza, Near Rajiv
Gandhi Circle, AB Road Indore, MP, 452 001, India
Phone: +91-731-497 2065
email: sales@trumen.in web:www.trumen.in
Trumen Technologies Pvt. Ltd.
(an ISO 9001:2008 company)
Specifications are subject to change without prior notice
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Trumen Technologies Pvt. Ltd.
Email: info@trumen.in, Web: www.trumen.in
Open Channel Loss of Head Indicator,
Controller & Transmitter
LoH-ICT
Rly1 Rly2 Rly3 Rly4 Func.
F1
F2
1 2 3 4 5 6 7 8 9 10 1112 13 14 15 16 17 18 19 20 21
NC P NO
Isolated
80 to 260
VAC
50/60 Hz
4-20mA o/p
L N
Sensor2
Sensor1
Sensor
Common
Sensor
Test
NC P NO x x x x
x x