1Introduction

This instrument has a LCD display with multiple wavelength options, over 30 measured parameters, built-in curves, built-in printer, and USB interface for data upload. It is widely used in environmental monitoring, sewage treatment, large, medium, and small water plants, industrial and mining enterprises, domestic or industrial water use, universities, scientific research units, and other departments. The specific models are as follows:

TW-5158A portable ammonia nitrogen analyzer

TW-5158B portable COD analyzer

TW-5158C portable total phosphorus analyzer

TW-5158D portable total nitrogen analyzer

TW-5158E portable COD ammonia nitrogen analyzer

TW-5158F portable COD total phosphorus analyzer

TW-5158G portable COD total nitrogen analyzer

TW-5158H portable COD ammonia nitrogen total phosphorus analyzer

TW-5158I Portable COD Ammonia Nitrogen Total Phosphorus Total Nitrogen Analyzer

2Instrument features

1)Separating the digestion instrument from the measuring instrument does not affect the measurement accuracy. Temperature PIDAutomatic temperature control and timing.

2)LCDThe large LCD screen displays all in Chinese, making it easy and intuitive to operate.

3)High performance and ultra-low power consumption 16Equipped with a microcontroller and a high-capacity rechargeable lithium battery, the host can be used for up to six months.

4)The instrument is convenient, compact, and easy to carry for on-site testing. Multiple power supply methods, including car cigarette lighters, high-capacity portable lithium batteries, and 220VPower supply, to get rid of the trouble of being unable to detect in the wild due to the inability to find conventional power sources.

5)The digestion instrument can be equipped with portable high-capacity lithium batteries to meet the needs of large-scale water sample determination

6)Can save standard curves up to 30Strip and 199 measured values (including concentration values with time labels, absorbance values, and transmittance). The curve can be calibrated and saved by itself.

7)With USBInterface, can connect to a computer, can upload and print stored data.

8)Cold light source, narrowband interference optical system, good optical stability.

9)Data power-off protection function.

10)The host chassis adopts molded ABSThe material has good anti-corrosion, waterproof, and dustproof properties.

11)High strength suitcase, beautiful, sturdy, and easy to carry

3Main technical indicators

1) Measurement range: (measured after dilution in excess range)

COD：（5～2000）mg/L；

Divided into three ranges: (5-200) mg/L, (200-1000) mg/L, and (1000-2000) mg/L

Ammonia nitrogen: (0.02-25) mg/L; Divided into two ranges: (0.02-5) mg/L and (5-25) mg/L

Total phosphorus: (0.00-10) mg/L; Divided into two ranges: (0-2) mg/L and (2-10) mg/L

Total nitrogen: (0.5-100) mg/L; Divided into two ranges: (0.5-10) mg/L and (10-100) mg/L

2)Indication error: COD：≤±5 %；

Ammonia nitrogen: ≤± 3% (F.S)And the largest among 0.2;

Total phosphorus: ≤± 5% (F.S)And the largest among 0.2;

Total nitrogen: ≤± 5%

3)Repeatability: ≤ 3%

4)Repeatability: ≤ 3%

5)Anti chlorine interference: ≤ 2000mg/L(COD determination)

6)Temperature control system: (room temperature)～180）℃ can be set

CODThe digestion temperature is 165 degrees Celsius℃, total phosphorus digestion temperature: 120 ℃, total nitrogen digestion temperature: 125 ℃

7)Temperature control accuracy: ± 1℃

8)Dissolving time: (1)～999）minadjustable

CODThe digestion time is 15 minutesThe total phosphorus digestion time is 30 minutes, and the total nitrogen digestion time is 30 minutes

9)Optical stability: The absorbance value of the instrument is within 20 minutesInternal drift less than 0.002A

10)Batch processing capacity: 4A water sample

11)Power consumption: current<40uADissolver power consumption:<65W

12)Environmental temperature:（5～45）℃

13)Relative humidity: ≤ 85%

14)Power supply: Tester: Built in rechargeable lithium battery

Dissolver: car cigarette lighter, portable lithium battery or 220Vpower supply

15)Dimensions: Measuring instrument: 80mm × 230mm × 55mm

Dissolving instrument: 105mm × 160mm × 90mm

16)Weight: Measuring instrument 0.5kgDissolver: 1kg