Water Weater Sensor Probes Transitter Datalogger Instruments and Handheld Meters.

Testech

M2M RTU/Telemetry and SCADA HMI Software for Wireless Remote Monitoring, SMS/GPRS Remote Monitor Terminal (Support DIO, Analog, Relay Output). System Integration, Embedded Hardware/Software Project related to M2M and Remote Telemetry. Design and Development Services.
Includes Water and Weather Sensors, as well as HVAC Sensors Monitoring and Alarm/Alert Notification/ SCADA HMI.

Global Water

Water and Weather Stations, Sensor Probe 4-20mA Transmitter Display Controller Datalogger for Water Level, Flow, PH, Temperature, ORP, Turbidity, Conductivity, Chlorine, Dissolve Oxygen.
Rain Gauge, Tipping Buckets.
Low Cost Datalogger Battery Operated.
Water/River Flow probe

In-Situ

Water Level Sensors, Water Quality Sensor for robust ground water, Aquaculture. [Dissolved Oxygen, PH, ORP, Temperature]

Solinst

Level Logger, Telemetry, Ground Water, Sample Pump, Water Level Meter.

AquaLabo

COD/BOD/TOC Sensor Transmittter with Serial or analog 4-20mA for Waste Water Monitoring.

Flow-tronic

Raven-Eye Non Contact Radar Flow Sensor for Open Channel, Wastewater, Effluent Measurement.