A head for the analyzer
The figures on this page are what a bid clause and a later spot check both use. The measurement and the link use a 24-bit Σ-Δ ADC and stay predictable across wide temperature, wide supply voltage, and electrical noise. Terminals pull out, key chips have a watchdog and a redundant check, and firmware can be signature-checked and rolled back, which is what a batch shipment and remote service need.
The default port is a fiber SFP on a standard industrial connector, for SCADA, energy management, or an IoT platform. SimtoLink includes a southbound point-table template and northbound MQTT/HTTP examples so commissioning is shorter. Volume jobs can add case marking, a set harness length, a protocol map, and a calibration certificate.
Salt, vibration, and the reading
Salt-spray and vibration type-test items are on the record. Ports have surge and reverse-polarity protection. Ground is zoned so a loop or common-mode noise is less likely to move the reading. Outdoor and coastal orders can take a higher ingress rating and a corrosion coating.
Parameters and thresholds load as a batch. Selected models store an event or a waveform. OTA carries settings and firmware. Accept the head with a power-on self-test, a time sync, and a sample of readings. For metering or safety, SimtoLink helps with a third-party metrology submission and the type-test file.
Hardware figures
Typical order, for selection and for a bid clause. For a wider range, a redundant supply, or an intrinsically safe explosion-proof variant, ask SimtoLink for the hardware specification and the installation guide. Order codes can differ slightly; the nameplate and the papers in the box decide.
| Item | Specification | Note |
|---|---|---|
| Measured quantity | Flow | Factory calibration certificate |
| Span | 0～100 m³/h | Can be extended |
| Accuracy / linearity | ±0.57 %FS | Compensated over the temperature range |
| Frequency response | 0.5～5 kHz | IEPE optional |
| Medium temperature | -30～117 ℃ | Depends on the probe |
| Supply | DC 24V | Surge protection |
| Output | 0～10V | Isolated |
| Process connection | Flange DN50 | Stainless steel 316L |
| Protection | IP65 | For long immersion |
| EMC | GB/T 17626 level 4 | Industrial site |
Where residual chlorine is watched
Four water systems where this head is usually specified.
Plant outlet and the network
Residual chlorine at the clear-water tank, the secondary pump room, and the far end of the network, so the dose can be trimmed and a "yellow water" event can be traced.
Pools and water parks
Residual chlorine and ORP on the circulation loop, for a public-health inspection and a fast response when the pool is full.
Hospital and lab drains
Disinfection wastewater and lab waste are watched at the treatment point, so the discharge stays inside the limit and the log is kept.
Secondary supply and building drinking water
The head joins the pump-room cabinet and the building network. An out-of-range reading starts a water change and pushes an alarm.
Install, ground, and recheck
- Confirm the supply window and polarity before the head is powered. Measure the bus and the breaker if the feed is uncertain.
- Shielded twisted pair, shield at one end, kept off long power-cable runs.
- In the lab, read and write both ways and trip one threshold against the analyzer, then move the head to the sample point.
- Outdoors, let water leave and air move, look at the seal, and keep the lightning earth inside the local rule.
- Every 6 months, sample the residual-chlorine series and archive the log.
Order, documents, and support
SimtoLink supplies the hardware specification, the outline, a wiring table, and a sample project. Volume orders can include a sample review and a factory inspection. Warranty and calibration follow the contract and the papers in the box.