We design, build, program and commission the control that runs your plant — from a single drive panel to a full production line. Engineered, documented and serviced from Dhaka.
Every job we take is some version of this loop: read the process, decide what to do, drive the machine, check the result. What changes is the scale.
Survey, drawing, panel, program and commissioning from the same engineers.
Source files, as-built drawings and passwords handed over at the end of every job.
We specify makes your maintenance team can source in Dhaka without an import.
HMI screens and operating instructions in the language your operators read.
If any of these sound like your floor, a survey is the cheapest next step.
Eight lines of work, delivered by one team, so nobody points at the other contractor when something stops.
New logic, or changes to logic already running. Operator screens written in plain language, with alarms that say what to do rather than showing a code.
One screen for the whole floor, with production, downtime and alarm history stored so a report can be pulled for any shift or any month.
Sizing, installation and parameter setting for motors, fans, pumps and conveyors, including harmonic and cable-length considerations on long runs.
Drawings, enclosure, busbar, wiring and routine testing in our workshop before anything reaches your site.
Sensors and transmitters selected, installed, loop-checked and calibrated, with traceable records you can put in front of an auditor.
Obsolete or dead controllers replaced while the mechanical machine stays, usually at a fraction of what a new import costs.
Meters on each line or section, logged against production, so consumption can be compared per unit made rather than per month.
Annual contracts with agreed response times, spares held for your panels, and diagnosis over the phone before anyone travels.
Built to your drawing or ours, wired to a schedule, ferruled at both ends, tested and photographed before dispatch.
The range we design and build within. If your requirement sits outside it, say so at enquiry stage and we will tell you honestly whether it is our work or somebody else's.
415 V three-phase and 230 V single-phase, 50 Hz. Busbar assemblies to 4000 A, with short-circuit withstand specified per project.
Wall-mount, floor-standing and modular line-ups in 1.6 to 2.0 mm powder-coated sheet steel. IP42 to IP66 depending on the room; stainless steel where washdown or chemical vapour is present.
Compact and modular PLCs from eight I/O points to distributed systems of several thousand. Safety-rated controllers where a risk assessment calls for them.
Touch panels from 4 to 21 inches, and industrial PCs for larger displays. Screens in Bangla, English or both, switchable by the operator.
Single-station through to multi-client systems, with historian, trend recording, shift and batch reports, user roles and an audit trail of who changed what.
Modbus RTU and TCP, Profibus DP, Profinet, EtherNet/IP, CANopen, IO-Link and OPC UA. Existing machines are usually reachable on at least one of these.
Variable frequency drives from 0.37 kW to 400 kW, soft starters, and multi-drive line-ups on a common DC bus where regenerative loads justify it.
4 to 20 mA and HART loops, RTD and thermocouple temperature, pressure, level, flow, pH, conductivity, load cells and weighing.
VPN or cellular gateway behind a firewall, set to read-only or full access according to your IT policy, and switchable off from the panel.
Single-line and wiring drawings in AutoCAD and PDF, I/O schedule, cable schedule, signed routine test report, operation and maintenance manual, and a backup of every program file.
Automation is often sold on an energy promise. Three mechanisms do most of the real work, and each one only applies in particular conditions.
For centrifugal loads, power rises roughly with the cube of speed. Running a fan at 80 per cent speed instead of throttling a damper draws close to half the power. This is the largest single saving available in most plants — but only on loads that genuinely vary. A motor at full load all day saves nothing.
Correcting power factor removes the utility penalty, and it also lowers current in the same cables. That means less heating, less voltage drop at the far end of a long run, and spare capacity recovered on a transformer that felt full.
Compressors, exhaust fans, chillers and lighting often run through breaks, changeovers and the last hour before a shutdown. Interlocking them to the machine that actually needs them costs very little and gives back hours every week.
Where the saving is not obvious, we log current and run hours on the actual load for several days first. If the numbers do not support the investment, we will tell you that rather than sell you a drive.
Four representative scopes, written out so you can judge whether your own job is larger, smaller or something else entirely.
Vessel and heating kept, control replaced.
Discharge that stands up to an inspection.
Pressure held in a band instead of a peak.
Essential lines stay up, the rest wait.
Plants around Dhaka, Gazipur, Narayanganj, Savar, Ashulia and Chattogram — and anywhere else in Bangladesh a job justifies the journey.
Dyeing and finishing control, boilers, compressors, effluent pumps and line output monitoring.
Controlled utilities, batch records, alarm history and change control that survives an inspection.
Mixing, filling, CIP cycles and temperature control, with washdown-rated enclosures and fittings.
Extruder and moulding control, heater zone tuning, and retrofits of imported machines no longer supported.
Furnace control, drive coordination across mill stands, and panel work built for heat and vibration.
Conveyor interlocks, weighing and batching, dust collection, and plant-wide start and stop sequences.
Dosing, pH and flow control, pump and blower sequencing, and a discharge log kept for the regulator.
Inverter integration, changeover logic and generation monitoring, delivered alongside THB Solar.
Six stages, in this order, with a named engineer responsible at each one.
We walk your floor, list the machines and loads, photograph the existing panels, and find out what is actually breaking rather than what was reported.
Single-line diagram, I/O schedule, panel general arrangement and a written scope, so the quotation states what you receive rather than a lump sum.
Enclosure, busbar, components and wiring assembled in our workshop, then routine tested and photographed before it ships.
PLC logic, HMI screens and drive parameters written against the agreed scope and simulated before anyone reaches site.
Installation, loop checks, trial runs on your own product, and training for the operators and maintenance staff who will live with it.
The full document set, a backup of every program file, a spare parts list, and a maintenance contract if you want one.
A panel is only as good as what happens after we leave. These are the things we do not skip when a deadline is tight.
Three ways to keep us on call. What it costs depends on the number of panels and the distance, so ask for a figure against your own plant.
For plants with their own maintenance team
For a single line or utility area
For continuous process plants
Quotations in this field are full of abbreviations. Here is what they mean, so nobody can use them to make a simple job sound complicated.
Programmable logic controller — the industrial computer that decides what the machine does, written as logic rather than software code.
Human machine interface — the touch screen on the panel door where the operator sets values and reads alarms.
The computer system that watches many machines at once, stores the history, and produces reports. An HMI shows one machine; SCADA shows the floor.
Variable frequency drive — changes the speed of an AC motor instead of running it flat out and throttling the output.
Brings a motor up to speed gradually to avoid the mechanical shock and current surge of a direct start. It does not control speed afterwards.
Power factor improvement — capacitors that correct the lag between voltage and current, removing the utility penalty and freeing capacity.
Automatic transfer switch — moves the load between mains and generator by itself, in a controlled sequence.
Inputs and outputs — the count of signals in and out of the controller. It is the honest measure of how large a control job really is.
Two digits stating how well an enclosure keeps out solids and water. IP54 handles dust and splashes; IP65 and above handles washdown.
A condition that must be true before something is allowed to start — a guard closed, a valve open, an upstream machine already running.
Keeping the mechanical machine and replacing only its control, which is usually a fraction of the cost of importing a replacement.
The drawing corrected after installation to show what is genuinely there. Without it, the next fault takes twice as long to find.
We program, wire and service equipment from the makes your maintenance team can already source locally, so a spare is a phone call rather than an import licence.
THB Industrial Automation is a division of THB — The House of Business, a Dhaka-based group operating ventures across engineering, energy, services and technology. When a job needs more than control, the rest of the group is already inside the house.
Electrical and mechanical installation work that sits under and around the control system.
Rooftop and ground-mount solar, net metering and inverter integration for the same plants.
Wholesale supply of the cable, breakers, contactors and accessories a panel job consumes.
Day-to-day upkeep once a system is running, with technicians on site or on call.
No, not inside Dhaka and the nearby industrial belts. We come, look at the machines, and tell you what the options are. Outside that area we ask for travel cost only.
Yes, and much of our work is exactly that. If the original program is locked or missing, we tell you honestly what can be recovered and what must be rewritten before you spend anything.
A straightforward drive or pump panel is usually two to three weeks from approved drawing. A PLC panel with programming runs four to six weeks. Imported components are the usual reason a date slips, and we identify those items at quotation stage.
That is a design decision, not an afterthought. HMI screens can be written in Bangla, alarms say what to do rather than showing a code, and we train the operators and maintenance staff on site before handover.
Sometimes, not always. It pays back fastest on fans and pumps that run part-loaded for long hours, and it saves almost nothing on a motor that runs at full load all day. We measure before recommending, and we will say so when the answer is no.
One year on our workmanship and wiring from the date of commissioning. Components carry the manufacturer warranty, and we register them in your name so the claim is yours to make.
Yes. Most retrofit work is planned around a Friday or a scheduled shutdown, with as much as possible built and tested in our workshop first so the time on site is short.
You do. The PLC and HMI project files, the passwords and the as-built drawings are handed over as part of the final payment, not held back as leverage for future service work.
Call and describe the fault. It is often solved on the phone before anyone travels.
Tell us what is on your floor and what is giving trouble. We reply the same working day.
