GMT-H2 Weight Transmitter
Quick specs
| Approval & Accuracy | |
|---|---|
| Excitation Voltage | DC 5 V, 200 mA (max); 1 analog channel, up to 8 × 350 Ω load cells |
| Signal Input Range | 0.002 – 15 mV (3 mV/V load cell) |
| Accuracy | Non-linearity 0.01% F.S; input sensitivity 0.01 µV/d |
| Division / Resolution | 1/1000000 max; 480 readings/s (selectable) |
| Connectivity | |
| Digital I/O | 4 in / 6 out transistor I/O; 4 preset points |
| Serial Comms | 2× RS485 + 1× RS232 |
| Analog Output | 1× analogue output (current / voltage selectable) |
| Physical & Environment | |
| Display | 2" 6-digit LED nixie + 5-key keyboard |
| Housing | Stainless steel hanging / desktop |
| IP Rating | Waterproof stainless shell with cable glands |
| Mount | Wall hanging or desktop (246 × 220 × 59 mm stand) |
| Power Supply | DC 24 V (18 – 36 VDC); ~10 W; 2200 g; 240 × 70 × 150 mm |
| Operating Temperature | -10 ℃ to +40 ℃ (certified) |
| Operating Humidity | ≤90% RH, non-condensing |
Applications
Applications
Stainless steel enclosure. IP65 washdown rated. Multiple PLC protocol support.
- Food production washdown
- Pharmaceutical processing
- Dairy and beverage
- Chemical environments
- Hygienic weighing
- Vessel and silo weighing
- Weight checking
- Batching and recipe dosing
OEM & ODM ready
Built for integration into your line, your machine, or your brand.
As General Measure’s South African partner, R&D Weighing supports OEM and ODM engagements across the transmitter range. From private-label badging through to custom enclosures, communication protocols, and full system integration with your existing PLC, MES, or ERP environment.
- Private-label finishing & branding
- Custom enclosure & mounting options
- PLC / MES / ERP integration
- Bespoke communication / protocol configurations
- Multi-channel synchronisation
- Engineering support throughout commissioning
Compliance & quality
CE compliant
IP65 rated
The GMT-H2 stainless steel weight transmitter is a DC-powered weighing instrument built for permanent in-plant installation. Powered from 24 VDC and housed in an IP65 stainless steel enclosure, it pairs a bright 2-inch 6-digit LED display with high-resolution weighing (up to 1/1000000 internal, 480 readings per second) and legal-for-trade accuracy. With dual RS485, RS232, a network port, versatile 4-in/6-out I/O, an analog output and one optional industrial bus card, the H2 drops cleanly into a PLC or SCADA control cabinet - the wired, high-accuracy counterpart to the field-mounted H1, ideal for food, pharma, dairy and chemical plants across Southern Africa.
Bright LED display and high-resolution accuracy
The GMT-H2 reads to 1/1000000 internal resolution at up to 480 conversions per second, driving a bright 2-inch 6-digit LED display that stays readable from across a packing hall - far brighter than an LCD wall-mount unit. Status LEDs for POWER, ZERO, STAB and NET, plus two COM indicators, give operators an instant view of whether the scale is settled and which communication line is active. It connects one 6-wire analog channel to up to eight 350 Ohm load cells (1/2/3 mV/V) at 0.01% F.S non-linearity, and carries CE marking and CMC accuracy class 3 for trade-approved weighing.
The 240 x 70 x 150 mm stainless steel waterproof shell uses cable glands for power, load-cell and communication entries - no exposed terminals and no path for water or dust to reach the electronics - making it suited to washdown and hygienic areas.
I/O and fieldbus, with a single load-cell channel
The H2 is a single-channel transmitter — one analog input for up to 8 × 350 Ω load cells in parallel. Where it earns its place against the smaller P1 is in I/O density and protocol coverage: four configurable transistor inputs, six configurable outputs, four preset points and an optional analogue output (current or voltage selectable). Two RS485 ports plus one RS232 are standard, so the unit can talk to a PLC on one bus and a print-and-stats package on another simultaneously.
Ethernet-based protocols (Modbus TCP, Profinet, EtherNet/IP, EtherCAT, CC-Link IE Field Basic) are order-option boards. Single-network-port and dual-port versions are available; the dual-port boards include a built-in switch for daisy-chain topologies.
Where the GMT-H2 fits in the line-up
Choose the GMT-H2 when the application is single-channel, needs a bright local readout for the operator, and runs in a wet or hygienic environment where a cabinet-mounted DIN-rail unit cannot live. For four independent scales in one waterproof housing, the new GMT-H4 is the equivalent. For AC-powered remote / off-grid duty with cellular telemetry, the GMT-H1 covers that niche. For DIN-rail cabinet duty inside a dry control room, the GMT-X1 is the more compact choice.
Frequently asked questions
Where is the GMT-H2 typically used?
Hygienic and washdown duty: food production, dairy, beverage, pharma, chemical processing. The waterproof stainless shell, cable-gland entries and bright LED display all suit plant-floor installations where the operator needs to see the weight from a distance.
Can I mount it on a desk instead of a wall?
Yes. The hanging suspension housing wall-mounts as standard; an optional 246 × 220 × 59 mm stainless stand turns it into a desktop unit for bench scales and weigh stations.
How does the H2 connect to a PLC?
Standard: RS485 Modbus RTU. Two RS485 ports plus one RS232 port are built in, so the unit can talk to a PLC and a printer or data-logger at the same time. Order options add Modbus TCP, Profinet, EtherNet/IP, EtherCAT or CC-Link IE Field Basic over Ethernet.
How many I/O points are available?
Four configurable digital inputs and six configurable outputs (transistor open-collector). One analogue output (4 – 20 mA or 0 – 10 V, selectable) is also available. The four built-in preset points handle simple set-point control without a PLC.
Is the GMT-H2 IP-rated?
The housing is stainless steel waterproof with cable-gland entries — built for washdown use. The manual does not publish a specific IP-rating number in the spec table; contact us if your project requires certified ingress-protection documentation.
What power supply does the H2 need?
DC 24 V (18 – 36 VDC), about 10 W. If your site does not have a 24 VDC bus and you need AC-mains input, look at the GMT-H1 instead, which runs directly off AC 90 – 260 V.
