深井水位传感器潜水压力发射器

WH311 Series

Ballast tanks; Ground water monitoring; Surface water monitoring; Deep watering; Down hole; Remediation and other environmental monitoring applications,etc.

Sewage lift stations, industrial slurry, industrial sumps, landfill leach ate, reservoirs, sludge pits, oil tanks, etc. reservoirs, sludge pits, oil tanks, etc.

2 of 6 WH*******                                                               Rev WH

Power Supply Voltage vs. Loop Resistance

Rev WH  3 of 6

TECHNOLOGY                                                                                                                                 Step Three

Technology: A sealed pressure transmitter is placed near or on the bottom of the tank. A stainless steel pressure diaphragm within the pressure transmitter is exposed on one side to the application liquid. The other side is exposed to the reference pressure via a small ventilation tube located inside of the PVC cable. A difference in pressure between liquid and reference pressures will slightly deflect the diaphragm. The deflection of the diaphragm is measured by a built‐in microprocessor that provides greater linearity correction over common thermal compensation methods. A 4‐20 mA current signal proportional the height of the liquid is generated from the microprocessor.

4 of 6 WH*******                                                                 Rev WH

SAFETY PRECAUTIONS                                                                                                          Step Four

About this Manual: PLEASE READ THE ENTIRE MANUAL PRIOR TO INSTALLING OR USING THIS PRODUCT. This manual includes information on all versions of the WHSENSORS Series Pressure Level Transmitter ; series WH311. Please refer to the part number located on the transmitter label to verify the exact model which you have purchased.

User’s Responsibility for Safety: WHSENSORS manufactures a wide range of liquid level sensors and technologies. While each of these technologies are designed to operate in a wide variety of applications, it is the user’s responsibility to select a technology that is appropriate for the application, install it properly, perform tests of the installed system, and maintain all components. The failure to do so could result in property damage or serious injury.

Proper Installation and Handling: Only properly‐trained staff should install and/or repair this product. Use a proper sealant with all installations. Always check for leaks prior to system start‐up.

WH311  series liquid level transmitter are designed to meet the rigorous environments of applications such as deep well monitoring, pump tests,lift stations, chemical tank levels,groundwater and surface water measurement, and process control. Providing a 4-20mA output signal compatible with DCS,PLC s, panel meters, data loggers, and other electronic equipment.This is ideal for solar or battery powered installations. These transmitters can offer all ranges equivalent from 1 psi through 300psi while all units of measure and cable lengths are customer-defined for individualized specifications.

The WHsensors WH311Series Submersible Level Transmitters are manufactured for years of trouble free service. The pressure transmitter measures the height of liquid above the position in the tank referenced to atmospheric pressure. Lightning and surge protection (not guaranteed or covered by standard warranty) is included standard to stand up in harsh applications. The transmitters are vented for barometric pressure compensation. Vent is covered with a maintenance‐free filter preventing particulate or water droplets from entering the transmitter. We offer the WH311 desiccant filter that can be attached to the vent tube.

Wiring and Electrical: CAUTION: Do not exceed specified supply voltage rating of 220 VAC. Permanent damage not covered by warranty will result. This device is not designed for 220 volt AC operation. Use only on connect with WH6 DISPLAY.This WH6 display is embedded with 24VDC power module  ,support WH311 transmitter daily working .

Temperature and Pressure: The WH311series are designed for use in application temperatures from ‐20° to 100°C (‐4° to 212°F). Both series are designed for use at pressures up to 2 x the full span.

Material Compatibility: Both series are made of 316 Stainless Steel (316 SS) with a cable of PVC.  Make sure that the model which you have selected is chemically compatible with the application liquids.

Flammable, Explosive and Hazardous Applications: DO NOT USE WH311 SERIES

LEVEL TRANSMITTER IN HAZARDOUS LOCATIONS.

Make a Fail‐Safe System: Design a fail‐safe system that accommodates the possibility of transmitter failure or battery power loss. In critical applications, whsensors recommends the use of redundant backup systems and alarms in addition to the primary system.