An online turbidity sensor price cannot be compared responsibly without defining the measuring range, water type, accuracy requirement, installation, output, cable, accessories, and quantity. A low-range drinking-water point and a 0–1000 NTU wastewater point may use different configurations even when both are called turbidity monitoring. YEX-S1-ZS offers selectable 0–20.00, 0–200.0, and 0–1000.0 NTU ranges with RS-485 Modbus RTU output, 12–24 V DC power, and IP68 protection. The correct quotation should cover the complete measurement loop rather than a probe price with missing installation items.

Why Turbidity Sensor Quotes Vary

Range selection is the first cost and suitability driver. Finished drinking water normally prioritizes low-end resolution and zero stability. River, stormwater, and industrial discharge applications need enough headroom for particle spikes. Selecting a broad range only because it appears more flexible can reduce the usefulness of low-level readings; selecting a narrow range can cause saturation during process upsets.

The second driver is scope. One supplier may quote only the sensor, while another includes a bracket, flow cell, controller, custom cable, cleaning accessories, calibration solution, gateway, or commissioning. A probe-only comparison hides the cost that will later appear in the panel, mechanical, and fieldwork packages. Buyers should issue the same bill of materials and technical schedule to every supplier.

Water conditions also influence lifecycle cost. Bubbles, color, oil, algae, scale, and biofilm can change optical readings or increase cleaning frequency. A price review should include accessibility, cleaning labor, verification standards, spares, and downtime. For an unattended river station, one avoided service trip may be more valuable than a small difference in purchase price.

Documentation and project support also belong in the comparison. Export projects may require an English datasheet, dimensional drawing, wiring diagram, Modbus register list, packing information, and a clear warranty boundary. Integrators may need pre-shipment address configuration, controller communication checks, or a sample unit before releasing a larger order. These services have real engineering value because they reduce cabinet redesign and commissioning time. Ask every bidder to identify which documents and configuration services are included rather than assuming that all suppliers deliver the same handover package.

Online Turbidity Sensor Price Factors

Verified YEX-S1-ZS Specifications

How to Select the Range Before Asking for Price

Use actual data whenever possible. For a filtered-water outlet normally below a few NTU, the 0–20.00 NTU configuration provides appropriate low-end resolution. For process water or surface water with wider variation, 0–200.0 NTU may offer useful headroom. Influent, stormwater, and variable wastewater may need the 0–1000.0 NTU configuration. The final choice should consider both normal operation and credible peak events.

Do not use TSS data in mg/L as an automatic substitute for NTU. Turbidity describes optical scattering, while suspended solids describes mass concentration under a defined method. Particle size, color, and composition can change the relationship. If the project needs TSS or MLSS for sludge control, request a sensor calibrated and specified for that output rather than converting a turbidity value with an assumed universal factor.

Installation Scope That Changes Total Cost

Immersion mounting is straightforward when a tank or channel provides stable depth and a safe service platform. The bracket should hold the optical window away from walls, sediment, direct sunlight where relevant, and concentrated bubbles. It should also allow operators to remove the probe without entering an unsafe area.

A bypass installation may suit pressurized pipes, drinking-water cabinets, or processes that cannot be stopped. The quotation then needs a flow cell, isolation valves, sample tubing, pressure control, drainage, and possibly bubble removal. Sample flow must remain representative; a blocked or stagnant bypass can produce a stable but meaningless value.

Custom cable length should be confirmed before ordering. A waterproof junction above the flood level is preferable to an improvised submerged splice. Include cable protection, gland size, terminal plan, and service loop. If the station is outdoors, the cabinet, power protection, and telemetry may cost more than the probe itself and should be budgeted as a system.

Quantity planning should include operational spares. A single critical discharge point may justify one ready-to-use replacement probe so the plant can restore monitoring while the original unit is inspected. Multi-site buyers can often share a smaller central spare pool if ranges, Modbus settings, cable connections, and mounting hardware are standardized. Standardization lowers training and commissioning effort, but it should not force a high-range model into a low-turbidity application where resolution is the real requirement.

Integration, Calibration, and Acceptance Costs

For Modbus RTU, obtain the device address, baud rate, parity, register map, byte order, scaling, and engineering unit. The PLC or gateway should store the converted NTU value, communication status, and maintenance events. Alarm logic needs delay and maintenance hold so cleaning does not create a false release or backwash command.

Budget for zero and standard verification appropriate to the selected range. During calibration, keep a consistent immersion geometry, avoid bubbles, and allow the reading to stabilize. Acceptance should verify the probe in standards, confirm the complete display and alarm path, and compare installed data with a reference sample taken from the same water at the same time. Define the allowed difference before purchase.

How to Request a Comparable Turbidity Sensor Quote

Send a one-page schedule listing water type, normal/minimum/maximum NTU, temperature, pressure, color, bubbles, oil or algae, installation drawing, cable length, power, controller model, communication requirement, quantity, spares, destination, and deadline. State whether the value drives compliance, filter backwash, process alarms, or trend display. Ask suppliers to separate sensor, mounting, flow cell, cable, controller, calibration materials, gateway, freight, and commissioning.

Frequently Asked Questions About Online Turbidity Sensor Price

1. How much does an online turbidity sensor cost?

The price depends on range, accuracy, installation accessories, cable, controller, cleaning, quantity, and delivery scope. A 0–20.00 NTU drinking-water configuration should not be compared with a 0–1000.0 NTU wastewater package using only the probe line item. Send the same technical schedule to suppliers for a meaningful comparison.

2. Which YEX-S1-ZS range should I request?

Choose 0–20.00 NTU for low-turbidity points when low-end resolution is important, 0–200.0 NTU for broader process or surface-water variation, and 0–1000.0 NTU for high or strongly fluctuating conditions. Confirm both typical data and credible peaks so the sensor does not saturate during the event the project must detect.

3. Does the quoted price include a display or controller?

Not necessarily. YEX-S1-ZS provides RS-485 Modbus RTU data, which a compatible PLC, RTU, gateway, or controller can read. If the project needs local display, relays, 4G telemetry, or cloud storage, list those items explicitly and ask for separate pricing.

4. Is a flow cell required?

No for every project. Tanks and channels can use an accessible immersion mounting. Pressurized pipes, compact drinking-water cabinets, or locations with unstable depth may benefit from a bypass flow cell. Provide pressure, flow, tubing, drainage, and bubble conditions so the supplier can quote the correct mechanical scope.

5. Why can two turbidity sensors with the same range have different prices?

They may differ in accuracy, optical construction, materials, communication, protection, included cable, calibration documentation, accessories, and support. Compare the complete specification and acceptance obligations. Similar range labels do not prove that two measurement loops provide the same performance or lifecycle cost.

6. Can turbidity be converted directly to suspended solids?

Not with a universal conversion. NTU is an optical response, while TSS is a mass concentration. A site-specific correlation may be developed for a stable water matrix, but it can change when particles change. If procurement requires mg/L output, specify an online TSS sensor or an approved site correlation procedure.

7. What maintenance costs should be included?

Include cleaning labor, access equipment, calibration standards, site travel, spare units or critical parts, and downtime. Wastewater, algae-rich water, and outdoor stations generally need more frequent inspection than clean water. Begin with a conservative schedule and adjust it using actual fouling records.

8. What information gets the fastest accurate quotation?

Provide water type, NTU range, interference conditions, installation, cable length, controller, power, quantity, destination, and delivery date. Add drawings or site photos and state the operational decision the reading supports. This lets YEXsensor confirm range, accessories, Modbus documents, and the total supply boundary in one review.

Summary

Before approving the purchase order, review the final model, selected range, included accessories, delivery documents, spare strategy, and site acceptance responsibility with both operations and automation staff.

Online turbidity sensor price is determined by the application and supply boundary, not the model name alone. YEX-S1-ZS provides selectable 0–20.00, 0–200.0, and 0–1000.0 NTU ranges, range-dependent resolution and accuracy, T90 under 30 seconds, RS-485 Modbus RTU, 12–24 V DC power, and IP68 protection. For a comparable quote, document the water matrix, real NTU data, mounting, cable, controller, accessories, acceptance method, quantity, and delivery requirement.