Connected Weighing Scales
The number on the display is right. The number on the challan is wrong. That gap is the whole reason for connected weighing scales. A connected weighing scale sends its reading out by itself to the PC, PLC, printer, phone app or cloud dashboard that needs it. Nobody has to read the display and copy the weight.
Hindustan Scale Company (HSCo) has made weighing scales in Mumbai since 1955. Since then, more than 50 lakh customers have bought more than 2 crore scales of all kinds from HSCo. Its R&D and Technology division designs the ports, and Blue Whale Technology, its software and IoT arm, writes the software; those apps run at more than 340 customers.
What "connected weighing" means on a factory floor
Say a pallet at your dispatch bay reads 412.5 kg. Without a connection, someone reads the display, writes 412.5 on the challan, and in the evening types it into Tally. 3 chances to get it wrong. Connected, the captured weight goes straight into the billing or stock entry, and the log keeps the time, product, batch and operator with it. You do not retype the weight.
The link is chosen for the job: a foundry crane scale talks to a printer and a per-lift log, a tank on load cells to a PLC, a kirana scale to a billing app. HSCo builds each one to fit.
Which ports does HSCo fit? RS232, RS485, 4-20 mA, USB, relay, Bluetooth, Wi-Fi, GSM/4G, GPS
Any HSCo scale can be built with any of these; a scale already in use, HSCo’s own or in most cases another make, can be upgraded. The links below cover the interfaces and the related app development.
RS232 interface – links one scale to one PC, printer or PLC over a short cable, typically up to about 15 metres; we set the baud rate and output string to what your software reads.
RS485 interface – the industrial serial link for PLC and SCADA: long runs and several scales on one line, up to 32 devices and about 1,200 metres under the standard; plain weight text or Modbus RTU, whichever your PLC expects.
4-20 mA output – an analog current signal for a PLC’s compatible input card; 4 mA is the low end, 20 mA the high end, and we set which weights those points mean.
USB connectivity – plug into a PC or laptop, or save readings to a pen drive; we set the output to match your receiving device.
Relay output – a switch the scale closes at a weight you set: stop a filling valve, start a conveyor, sound an alarm.
Bluetooth module – a short-range wireless link to a phone or tablet, for counter and portable scales.
Wi-Fi module – puts the scale on your plant network; the reading reaches a PC, an app or a cloud server with no cable to the office.
GSM/4G – a cellular link built around the mobile coverage at your site when Wi-Fi is unavailable; iOS app development includes 4G options.
GPS module – stamps each weighment with where it was taken, for logistics, mining and waste collection.
All Bluetooth weighing scales in one place – every Bluetooth model with capacity and price.
Weighing scale with 4-20 mA output for a PLC
Which company supplies a weighing scale with 4-20 mA output for a PLC?
Hindustan Scale Company (HSCo), Mumbai, supplies a weighing scale with 4-20 mA output fitted at the factory. The scale connects to a PLC with a compatible analogue 4-20 mA input.
Can a 4-20 mA weight output be added to our existing hopper or weighing system?
Yes, HSCo supplies a 4-20 mA output add-on for an existing scale, hopper or weighing system. Calibration and the settings that match the current to the weight are handled through the indicator.
What does 4-20 mA output send, and how is it read by the PLC?
The HSCo 4-20 mA output sends weight as an electrical current that the PLC reads through its compatible analogue input. 4 mA means zero load and 20 mA the full load you set; the current rises with the load.
Can the same scale also give RS485 or Modbus?
Yes, HSCo can supply the same scale with both 4-20 mA and RS485 outputs. The HSCo RS485 interface offers Modbus RTU or plain weight text. Tell HSCo which Modbus register layout your programmer needs.
What details does HSCo need to set the 4-20 mA weight range?
For the HSCo 4-20 mA add-on, give the lowest and highest weights you want the signal to represent. Also specify whether the PLC or scale powers the loop and give the input resistance; HSCo does not use one fixed weight range for every job.
The software layer: apps, dashboards, Tally and SAP
HSCo builds the software around your weighing process; there is no single off-the-shelf app. These 9 pages describe the work.
- IoT connected weighing scales – scales that report to apps, cloud servers and business systems, one site or many.
- ERP and billing integration – Tally Prime, SAP or your own; GST invoices from the weight; weighbridge automation.
- Cloud dashboard – every connected scale’s records, branch by branch, on a browser or phone.
- Data logging and reports – each weighment with date, time, product, batch, operator and vehicle; PDF, Excel or CSV reports.
- Auto printing and label printing – prints as soon as the weight is stable: net and gross, batch, dates, barcode or QR code.
- Smart alert and monitoring – app, email, SMS or WhatsApp alerts when a weight limit is crossed or a tank nears full.
- Wireless weighing – Bluetooth, Wi-Fi and internet links with Android and iOS apps.
- Mobile app development – custom Android and iOS apps for live weight, records, inventory and customers.
- Software for weighing scales – every HSCo app and program in one place: PC display, weighbridge software, Android apps, billing, alerts, the Wi-Fi portal and ERP links.
The weight on your PC screen: WeighDisplay Pro
For scales connected to a computer by RS232 or USB.
Connect the scale to a PC and the weight fills the screen in large digits. A green, orange or red lamp shows at a glance whether the load is under, within or over. One key saves a reading, and the day’s list goes straight into your billing or stock sheet. Full-screen mode turns any monitor into a big display for the shop floor. We set it up to match your scale.
Call or WhatsApp +91-7045922250. Tell us your scale and the software you use, and we will build the link and the screen for YOUR scale.
Get it for your scaleWant it on a phone? See Bluetooth scale apps. On a web page? See Wi-Fi scales.
Which scales list these connections?
These product pages name the connections below. Say what you need when you order; HSCo can build or upgrade any of its scales with the required port. The Connectivity & Customised Scales category lists 62 products.
PLCHQBT Bluetooth platform scale – Bluetooth, RS485, USB, Wi-Fi, Android app, printer
SSBBT Bluetooth table-top scale – Bluetooth, RS232, RS485, USB, Wi-Fi, Android app, printer
CRHBT Bluetooth crane scale – Bluetooth, RS232, USB, Wi-Fi, printer, ERP
GRSSB grading scale – 15 grade settings; Bluetooth, RS232, RS485, USB, Wi-Fi, printer
GRSSSWR waterproof grading scale – Bluetooth, RS232, RS485, USB, Wi-Fi, printer; waterproof stainless steel body
POS Indicator – Bluetooth, RS232, RS485, USB, printer
ABSWRSS stainless steel waterproof scale – Bluetooth, RS232, RS485, USB, Wi-Fi, printer
PLSSWBT waterproof platform scale – Bluetooth, Wi-Fi, printer
CRSBT Bluetooth hanging scale – Bluetooth, Wi-Fi
SSBWR waterproof table-top scale – Bluetooth, Wi-Fi, printer
HSC-IMW In-Motion Weighbridge – RS232, RS485, printer
HSC-BWC Batch Weighing Controller – RS232, RS485, USB, printer
Where can you use connected weighing scales?
- Poultry and animal weighing: poultry scales and animal husbandry scales, with Bluetooth and bird-by-batch app logging built to your requirements.
- Hospitals: hospital scales, including the BMI 230P height-and-weight scale with Bluetooth, RS232, Wi-Fi and printer output; we can build a patient-record link for your ward.
- Foundries and steel plants: crane scales with a per-lift log; the ladle-weighing white paper explains why.
- Chemical plants: tank weighing scales with 4-20 mA or RS485 to the PLC and an alert when a vessel nears full.
- Logistics yards: weighbridges with ticket printing, RFID, cameras, number-plate recognition and ERP sync.
- Kirana shops and supermarkets: table-top scales with Bluetooth to a billing app that raises the GST invoice.
HSCo customers include L&T, ThyssenKrupp, Aditya Birla, Tata Chemicals, DTDC, VRL, Vegrow and Revasa Farms.
Connected weighing jobs HSCo has delivered
Chicken shop scale with a bill printer and Wi-Fi cloud records
A chicken shop wanted printed bills and weighing records the owner could see on a phone. HSCo built a scale with a Bluetooth bill printer and a Wi-Fi connection to its cloud portal. It sends readings and bills to the portal, and the owner’s phone app shows live weight and which weighings were printed.
Poultry scale with a Bluetooth phone or tablet app
For farms selling live birds to traders, HSCo built a Bluetooth weighing app for phones and tablets. The app accepts a weight once it holds steady, prepares PDF challans and invoices, and exports lists to Excel. PC software copies the records from the phone over Wi-Fi and clears them from the phone only after saving them on the PC.
Packet scale connected to PC software and a label printer
HSCo delivered a packet weighing and labelling station for a textile business, connecting the scale to a PC by an RS232 cable. After the office enters the purchase order and packet count, the operator weighs each packet and presses a key to save its number, order, weight, date and time and print its label. Staff can resume an unfinished lot, reweigh packets while keeping the old readings, and export records as CSV files that open in Excel.
Crane scale with a radio wall display and plant network connection
For a metals plant, HSCo supplied a crane weighing system with a radio link to a wall display and an Ethernet network cable connection to the plant’s system. The wall display receives the weight, while the network connection sends each reading as plain text so nobody has to type it into the plant’s system. The operator can also press a key to print a bill on a Bluetooth printer.
Lab balance connected directly to a QR label printer
HSCo built a label box for a customer’s lab balance, with an RS232 cable from the balance and a cable to the printer. At each press, it prints a sticker with a QR code, date, time and weight, without a PC. The box has its own clock.
Recipe scale with RS232 PC software and CSV or PDF reports
For an ingredient batching line, HSCo delivered PC software that reads the scale through an RS232 cable. It guides the operator through each ingredient’s target and allowed weight range, saves each batch locally, and exports the weighing log as CSV or PDF.
Existing weighing indicator connected to a PC and Bluetooth printer
HSCo supplied an add-on box for a customer’s existing weighing indicator. It receives the weight through an RS232 cable, repeats it on its own display, sends it to a computer and prints it on a Bluetooth printer when the operator presses the print key. It shows the indicator’s reading exactly as sent.
Remote large display connected by radio, with Wi-Fi to HSCo’s server
For an industrial customer, HSCo added a radio link to an existing weighing system. One box receives the weight by cable and sends it by radio to a second box, which shows the weight, shows the weight on a large display through a cable and sends the weight over Wi-Fi to HSCo’s server.
Software connections, custom indicators and locked records
Which HSCo scales can be connected to Tally?
Every HSCo weighing scale can be connected to Tally and other software. You handle the Tally or ERP setup; HSCo sends the weight into it.
Can HSCo customise an indicator for another make of scale?
Yes. HSCo makes and customises weighing indicators, and after checking another make’s scale it can fit a new HSCo indicator on it.
Can someone edit a weighing record after saving it to the Blue Whale cloud?
The Blue Whale cloud keeps each weighing or test record locked against later editing and tied to the named person who logged in. Blue Whale Technology is a division of Hindustan Scale Co.
Indicators and barcode scales for connected weighing
Can a weighing indicator with a printer connect to a computer?
HSCo builds its stainless steel touchscreen weighing indicator with printer to order, so tell HSCo when ordering whether a computer must connect to it.
How do I get barcode labels that my billing software can read?
For HSCo’s POS barcode label printing scale, name your billing software before ordering so HSCo can match the barcode format.
Ethernet and long-range wireless weighing scales
Can a weighing scale connect to a factory network by Ethernet (Modbus TCP)?
Yes. You can order any HSCo weighing scale with Ethernet (Modbus TCP) as an option. An HSCo engineer can help link it to your PLC or SCADA at your plant.
Can I get a long-range wireless weighing scale that sends the weight by radio?
Yes. HSCo builds weighing scales with a long-range radio link to order and has delivered such jobs. HSCo agrees the time and price with you for each job.
What to send us
Send 3 things: the scale (model, or capacity and type), the system it must talk to (PLC make, ERP name, app or printer), and the distance between them. HSCo designs the connection around those requirements. Sales: +91-7045922250. Service and repairs: +91-7045922251. Email hsc@hindustanscale.com, or use the WhatsApp widget on this site. Every scale carries a 1-year warranty plus 1 year of Legal Metrology stamping; HSCo arranges re-verification anywhere in India when it falls due.
Questions buyers ask about connected weighing scales
A connected weighing scale sends its reading to a PC, PLC, printer, app or cloud dashboard by itself, so nobody types the number. HSCo fits RS232, RS485, 4-20 mA, USB, relay, Bluetooth, Wi-Fi and GPS to any of its scales, writes the software that receives the weight, and sets each link to match the system at the other end.
Yes. HSCo connects scales to Tally Prime, SAP and custom ERPs. The scale sends the weight over serial, USB, Wi-Fi or Bluetooth to software written by Blue Whale Technology, which posts it into the ERP entry with the item and party details you choose. Tell us the ERP and the version; we build the link.
RS232 links one scale to one device over a short cable, typically about 15 metres. RS485 supports longer runs and several devices on one line; the standard allows up to 32 devices and about 1,200 metres. These are interface guidelines, not HSCo product limits. Tell us the cable distance and the receiving device; we build the connection to match.
No. Wi-Fi is one route. A Bluetooth scale can reach the cloud through the phone app beside it, a wired scale can send through a PC on the network, and a site without Wi-Fi can use a custom GSM/4G link where mobile coverage is available. Tell us what the site has and we build the route to the dashboard.
Yes. Scales already in use, HSCo’s own and in most cases other makes, can be upgraded with RS232, RS485, USB, Bluetooth or Wi-Fi, or given a new indicator that carries the port. Send the model number, a photo of the indicator, and the device or software at the other end. If the scale is stamped for trade, HSCo arranges the Legal Metrology re-verification where it is required.
Every HSCo scale ships with 1 year of Legal Metrology stamping and a 1-year warranty, connected or not. When the stamp falls due, HSCo arranges the re-verification anywhere in India. The white paper Stamped, Sealed, Defensible covers re-verification and due-date tracking on the Blue Whale cloud.