Ultrasonic Level Sensors that Withstand Both Acids and Bases

Senix’s ultrasonic level sensors, when positioned in chemical tanks, offer resistance to deterioration due to chemical exposure. These compact, powerful ultrasonic level sensors can measure various liquids ranging from chemical tanks in the paper and food processing sectors (not ideal for high-temperature CIP operations) to diesel fuel in rail locomotives.

Heavy-duty electronics are epoxy potted into a housing made of polyvinylidene fluoride (PVDF), which has the ability to physically separate the transducer and electronics from the chemicals, and can resist exposure to acids as well as bases. They are used in many harsh factory surroundings as well as indoor and outdoor settings. The sensors are also used in liquid level applications where chemical resistance is not required.

Product Line Features

  • Operating temperature: −40 °C to 70 °C
  • Ingress: IP68, NEMA-4X, and NEMA-6P
  • Best suited for use in diesel fuel and chemical level applications in open or closed tanks
  • User-modifiable with SenixVIEW software (included) for testing, installation, and cloning sensors

ToughSonic® CHEM 10

  • Maximum/optimum range—10 ft (3 m)/80″ (2 m)
  • Body and transducer—PVDF (Kynar®), beam width 12 +/− 2°
  • Top threads—1″ NPT, tapered
  • Bottom threads—1.5″, fits BSP or NPT (threads not tapered)
  • Dimensions (D x L)—3.05 x 5.62″ (77 x 143 mm)
  • Simultaneous outputs—5 plus serial data; voltage, 2 current, and 2 switches
  • Adjustment—SenixVIEW PC software
  • Cable—6.5 ft (2 m) pigtail, 9-wire + drain
  • Cable, serial data-only models—6.5 ft (2 m) pigtail, 4-wire + drain, dual twisted pairs

ToughSonic® CHEM 20

  • Maximum/optimum range—20 ft (6.1 m)/13″ (4 m)
  • Body and transducer—PVDF (Kynar®), beam width 14 +/– 2°
  • Top threads—1″ NPT, tapered
  • Bottom threads—1.5″, fits BSP or NPT (threads not tapered)
  • Dimensions (D x L)—3.05 x 5.62″ (77 x 143 mm)
  • Simultaneous outputs—5 plus serial data; voltage, 2 current, and 2 switches
  • Adjustment—SenixVIEW PC software
  • Cable—6.5 ft (2 m) pigtail, 9-wire + drain
  • Cable, serial data-only models—6.5 ft (2 m) pigtail, 4-wire + drain, dual twisted pairs

ToughSonic® CHEM 35

  • Maximum/optimum range—35 ft (10.7 m)/25″ (7.6 m)
  • Body and transducer—PVDF (Kynar®), beam width 10 +/– 2°
  • Top threads—1″ NPT, tapered
  • Bottom threads—2″, fits BSP or NPT (threads not tapered)
  • Dimensions (D x L)—3.05 x 5.62″ (77 x 143 mm)
  • Simultaneous outputs—5 plus serial data; voltage, 2 current, and 2 switches
  • Adjustment—SenixVIEW PC software
  • Cable—6.5 ft (2 m) pigtail, 9-wire + drain
  • Cable, serial data-only models—6.5 ft (2 m) pigtail, 4-wire + drain, dual twisted pairs

Smart. Communications

Each CHEM sensor is provided with serial data communications to connect with SenixVIEW software or other equipment.

Models consist of an RS-485 or an RS-232 interface, with the below-mentioned communications format:

  • Baud rates from 9600 (default) to 115200 bps
  • Selectable Modbus (default) or ASCII streaming protocols
  • Can be adjusted using SenixVIEW software

The RS-485 Serial Data Interface is suggested unless connecting to an RS-232 device. Mentioned below are the benefits of RS-485 over RS-232:

  • Allows longer cable lengths at higher baud rates
  • Multi-drop Modbus addressing allows networks of up to 32 sensors
  • Enhanced noise immunity in industrial settings
  • Outcome: Extra capability at the same cost

If only a serial data interface is needed, all models are provided without the analog and switch outputs at reduced power consumption and less cost, and include a 4-wire dual twisted pair (plus drain) data cable rather than the basic 9-wire cable.

Smart Interfaces

Multiple simultaneous outputs enable these sensors to connect with various types of equipment.

  • Analog voltage (0–10 V DC) typically used with motor drives and similar equipment
  • Two switches: Each configurable as Sinking (NPN) or Sourcing (PNP)
  • Two analog 4–20 mA current loops (sinking and sourcing) for process industry transmitter applications

Maximum Flexibility

Sensor outputs can be configured by users using SenixVIEW.

  • Switches are available with both window and hysteresis modes, time delays (on, off, and no target)
  • The switches and analogs comprise response settings for power-on initialization, SYNC lost, and loss of target echo (delay and state)
  • Analogs can be calibrated between adjustable analog limits, any two distances, positive or negative slope, and no-target time delay

Connected Data

Multiple simultaneous outputs enable these sensors to connect with several types of equipment

  • Serial data communications (RS-232 or RS-485, choose model-wise)
  • Two switches: Each configurable as Sourcing (PNP) or Sinking (NPN)
  • Analog 0–10 V DC, 4–20 mA sourcing and 4–20 mA sinking
  • All outputs are SenixVIEW configurable

Wireless Connectivity

  • RS-485 models can be connected with Senix LoRa Wireless Transmitters
  • Less power dissipation and marginal cost

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