LDO3500 Fluorescence Dissolved Oxygen Controller / Transmitter
LDO3500 Fluorescence Dissolved Oxygen
It is suitable for accurate measurement and control of dissolved oxygen in all kinds of weather
and complex industrial environment.
●Suitable for precise testing and control of dissolved oxygen in various weather conditions and complex industrial environments. ·
●128 * 64 dot matrix LCD display, switchable between Chinese and English;·
●IP65 dustproof and waterproof rating, stable operation 24/7.·
●The adjustable digital filtering coefficient of the instrument displays more stable data with high anti-interference ability, suitable for most industrial applications.·
●Can be matched with 3 types of fluorescence sensors, with stronger selectivity for different needs·
●Fluorescence method dissolved oxygen electrode, more stable measurement, no flow rate requirement·
●Simple menu design, easy operation, and fast calibration.·
●There are manual compensation functions for atmospheric pressure and salinity.·
●RS-485 interface, photoelectric isolation processing, safe and reliable·
●Two switch control relays and one functional relay.·
●MODBUS-RTU communication protocol, capable of bidirectional instrument settings for convenient on-site debugging and use·
●Temperature reading offset adjustment·
●Power supply 85-260VAC (or 24VDC optional) · Two 4~20mA isolated current outputs
●128 * 64 dot matrix LCD display, switchable between Chinese and English;·
●IP65 dustproof and waterproof rating, stable operation 24/7.·
●The adjustable digital filtering coefficient of the instrument displays more stable data with high anti-interference ability, suitable for most industrial applications.·
●Can be matched with 3 types of fluorescence sensors, with stronger selectivity for different needs·
●Fluorescence method dissolved oxygen electrode, more stable measurement, no flow rate requirement·
●Simple menu design, easy operation, and fast calibration.·
●There are manual compensation functions for atmospheric pressure and salinity.·
●RS-485 interface, photoelectric isolation processing, safe and reliable·
●Two switch control relays and one functional relay.·
●MODBUS-RTU communication protocol, capable of bidirectional instrument settings for convenient on-site debugging and use·
●Temperature reading offset adjustment·
●Power supply 85-260VAC (or 24VDC optional) · Two 4~20mA isolated current outputs
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| Aquaculture | Industrial process | Boiler water | Circulating water |
| oxygen concentration DO mg/L |
measuring range | 0.00～20.00 m g/L |
| resolution ratio | 0.01 mg/L | |
| Measurement accuracy (electronic unit) | ±0.05 m g/L | |
| Complete set accuracy | ±0.3 m g/L | |
| Percentage oxygen content DO % |
measuring range | 0.0～400.0 % |
| resolution ratio | 0.1 % | |
| Measurement accuracy (electronic unit) | ±0.5 % | |
| Complete set accuracy | ±2.0 % | |
| temperature | measuring range | -0.0～55.0℃ |
| resolution ratio | 0.1℃ | |
| Measurement accuracy (electronic unit) | ±0.3℃ | |
| Temperature input | Automatic | |
| Temperature compensation | Automatic / manual | |
| Transfer current | Output, type | Two roads of 4~20 mA (the corresponding range can be set) |
| Current accuracy | ±1% F .S | |
| output loading | less-than 500Ω | |
| control | Functional relay | One (which can be set to the cleaning or alarm function) |
| Switch relay | 2 SPST relays | |
| load capacity | 2.5A 230VAC | |
| data transmission | coffret | All-way RS485 isolation voltage is 2500Vrms |
| protocol | MODBUS-RTU (read-write two-way communication) | |
| Other parameters | working power supply | 85~260VAC or 18~36VDC (optional before order) |
| working temperature | 0～60℃ | |
| Work humidity | Relative humidity was <90% | |
| levels of protection | IP65 | |
| way to install | Disk installation | |
| outline dimension | (H×W×D) 108×108×132 mm | |
| Open hole size | 92.592.5 mm (positive tolerance) |
| Electrode parameters | Application |
| CS4550D |  |
| 316L shell and film head, PG13.5 thread, Temperature built-in, φ13MM, 5M cable (customizable) | General municipal wastewater, industrial wastewater, river monitoring, fisheries and aquaculture, etc |
| CS4750D |  |
PPS shell,Upper and lower NPT3/4 threads, Temperature built-in, 5M cable (customizable) | General municipal wastewater, industrial wastewater, river monitoring, fisheries and aquaculture, etc |
| CS4750D-S |  |
| Plastic case, Submerged NPT3/4 thread installation, Aviation plug,Temperature built-in, 5M cable (customizable) | General municipal sewage, river monitoring, fisheries and aquaculture, etc |
| Submerged DO sheath (Aeration rotection device) FD-100 | |
| Including installation bracket, white sheath PPR material,1M,One end is a 3/4 tooth belt cable connector, and the other end is an electrode protection device,Can be used with PG13.5/M20 * 1.5 threads | Submerged and pool installation matching |
