Agtron ST Seed Sensor Datasheet

Product catalog summary

Product Description
The Agtron ST Seed Sensor is available in two models: the 32mm (1 ¼”) ST32E and the 25mm (1”) ST25E. Both models share identical cable and enclosure dimensions.

Physical Dimensions
The datasheet provides dimensions for the 32mm version, noting that dimensions are consistent across all hose sizes.

Connector Pin-outs
The sensor features a 5-pin connector with the following functions: Ground, Sensor Communications, Power, Programming (for use with Agtron programmer), and Shield.

Performance Characteristics

Optical Detection Elements: 4
Optical Sampling Frequency: 15 kHz
Optical Detection Zone: 2mm
Minimum Particle Detection Size: 1.5mm
Minimum Optical Cross Section Coverage: 40%
Optical Calibration Steps: 24 steps

Note: The sensor can detect a 1.5mm seed particle at a velocity of 22.5 meters per second.

Electrical Characteristics

Absolute Maximum Ratings: Ambient Temperature (-30°C to +85°C), Storage Temperature (-40°C to +105°C), Supply Voltage (7.0V to 18.0V), Maximum Current Consumption (125 mA @ 7V supply)
Operational Ratings: Ambient Temperature (-20°C to +50°C), Supply Voltage (5.0V to 16.0V), Nominal Current Consumption (65 mA @ 12V supply)

Communication Interface

Physical: Paired Shielded
Data Link: RS485
Baud: 250Kbaud
Redundancy: Bidirectional Interface
Communication Cycle Time (120 sensors): 350ms

Diagnostic data includes input voltage, micro temperature, regulated voltage, runtime timer, detector bias levels, detector calibration levels, emitter current output, software version, hardware version, and sensor type. The bidirectional communication allows for enhanced error detection and fault resistance.

Compliance Standards

ISO 15003
Cold and dry heat Level 3
Damp heat steady state Level 2
Damp heat cyclic Level 2
Particle impact 500kPa (11-14mm)
Mechanical shock Level 2
Random Vibration Level 2
Sinusoidal Vibration Level 2
Corrosive atmosphere Level 2
IP code IP67
Air pressure 80-100 kPa
Conducted transient ISO 7637-1 Level 2
ESD ISO 10605 Level 2

Catalog excerpts

Agtron ST Seed Sensor Datasheet Rev 04 Part Number

Open the catalog to page 1

Physical Dimensions Note: 32mm (1 ¼”) version shown. Cable and enclosure dimensions are identical for all hose sizes. C:\D\My Documents\brochures and advertisements\Legend\ST sensor datasheet rev04.doc

Open the catalog to page 2

Connector Pin-outs Function Ground Sensor Communications Power Programming (used only with Agtron programmer) Sensor Communications Shield Function Ground Sensor Communications Power Not used Sensor Communications Shield C:\D\My Documents\brochures and advertisements\Legend\ST sensor datasheet rev04.doc

Open the catalog to page 3

Performance Characteristics Optical Detection Elements…..………………………………………..4 Optical Sampling Frequency (1) ..……………………………………. 15 kHz Optical Detection Zone………………………………………………… 2mm Minimum Particle Detection Size .……………………………………. 1.5mm Minimum Optical Cross Section Coverage .………………………….40% Optical Calibration Steps (2).………………………………………….. 24 steps Note 1: 15kHz sampling frequency allows the detection of a 1.5mm seed particle at a velocity of 22.5 meters per second. Note 2: Calibration steps and range allow the sensor to adjust the optical intensity to compensate for foreign material build up on the...

Open the catalog to page 4

Communication Interface Compliance Standards ISO 15003 Cold and dry heat Damp heat steady state Damp heat cyclic Particle impact Mechanical shock Random Vibration Sinusoidal Vibration Corrosive atmosphere IP code Air pressure Corrosive atmosphere Conducted transient ISO 7637-1 ESD ISO 10605 C:\D\My Documents\brochures and advertisements\Legend\ST sensor datasheet rev04.doc

Open the catalog to page 5

Agtron ST Seed Sensor Datasheet

Agtron ST Seed Sensor Datasheet

Catalog excerpts

All Agtron Enterprises Inc. catalogs and technical brochures