TECHMO 7786 Series Sensing Eye786 Amplifier-Integrated Electrical Conductivity Sensor

Manufacturer : TECHNO MORIOKA
Model: 7786 series

Amplifier-integrated electrical conductivity sensor with serial communication and alarm output functions.

Mounting piping G1/2; confirmation; Amplifier and sensor integrated; dc power supply; No water quality information provided; Analog output; Mounting diameter R1/2

This is an ultra-compact, amplifier-integrated electrical conductivity sensor (conductivity sensor).
The screw-in portion is small (R1/2, G1/2), allowing for space-saving installation.
The A1XX and A3XX series feature analog output (4-20mA), while the A2XX and A4XX series have serial communication and alarm output, enabling water quality measurement and management in combination with control and display devices such as PLCs.
It supports high water temperatures up to 90°C, making it suitable for use in medical and food processing equipment requiring hot water disinfection.
The electrode structure (cylindrical electrode) is less susceptible to the effects of metal piping, allowing for direct screw-in into metal conduits.

Product-compatible water quality

Product usage

Product Specifications

Model	7786-A113 7786-A213 7786-A313 7786-A413	7786-A152 7786-A252 7786-A352 7786-A452	7786-A151 7786-A251 7786-A351 7786-A451	7786-A121 7786-A221 7786-A321 7786-A421
Measurement range (@5 to 90°C)	30–1000 μS/cm	15–500 μS/cm	1.5–50 μS/cm	0.6–20 μS/cm
Product size	W35 × H90.5 × D36.3
accuracy	Measurement accuracy: ±3.0% FS (at 25°C water temperature) Repeatability: ±1.0% FS (at equivalent resistance)
Analog output	4-20mA DC (0 to FS = 4-20mA)
Transistor output	A100 series: None A200 series: FET open-drain output, drive load conditions DC24V 50mA or less A300 series: None A400 series: FET open-drain output, drive load conditions DC24V 50mA or less
Serial communication	A100 series: None A200 series: RS-485, Modbus RTU, 9600bps, 8-bit, 1 stopbit, Non-parity A300 series: None A400 series: RS-485, Modbus RTU, 9600bps, 8-bit, 1 stopbit, Non-parity
power supply	DC24V (2.0W or less)
Usage environment	Ambient temperature 5-60°C (if water temperature is 80°C or higher, keep it below 45°C) Ambient humidity 5-80%RH (but no condensation)
Connection port diameter	R1/2: A100, A300 series; G1/2: A200, A400 series
cable	A100 series: 3-core cable, 2m (24V, GND, 4-20mA) A200 series: 6-core cable, 2m (24V, GND, 4-20mA, D+, D-, Tr) A300 series: 3-core cable, 2m (24V, GND, 4-20mA) A400 series: 6-core cable, 2m (24V, GND, 4-20mA, D+, D-, Tr)
others	Electrode structure less susceptible to the effects of metal piping, allowing direct screw-in into metal piping. Added 1000 μS/cm range for wider water quality compatibility. RoHS2 compliant. 7786-A200, A400 series. Serial communication allows simultaneous acquisition of water quality and temperature data. The serial communication protocol uses the general-purpose Modbus protocol. Serial communication function facilitates data acquisition (water quality, water temperature) for multi-point measurements. Transistor output function simplifies water quality management.