Field-installation type ammonia nitrogen meter

Ammonia nitrogen concentration in the tank is measured in real time with an ion electrode method sensor.

Ideal for aeration control and management in biological reaction tanks. It is equipped with a function that can diagnose the sensor degradation state by measuring the membrane resistance. Additionally, the reliability of measured values has been improved through the ability to perform continuous measurements while diagnosing deterioration.


* Optional measurement items.

Division: Process Water
Manufacturing Company: HORIBA Advanced Techno Co., Ltd.

Prevention of contamination for increased longevity

The protective film improves sensor durability. Combined with an ultrasonic cleaner, antifouling properties are improved.

Improved long-term stability

HORIBA's proprietary technology ensures stable measurements.

Easy maintenance

Replaceable chip without the need for tools. No need to call manufacturer maintenance.

Reduced risk of sudden operational shutdowns

The self-diagnostic function of the sensor enables the immediate detection of anomalies.

Ensuring accurate measurement values

Easy calibration to match manual analysis values.

Simultaneous measurement of dissolved oxygen (DO)

The converter can be connected, not only to the ammonia nitrogen sensor, but also to an optical DO sensor.

Instruction transmitter specifications


Ammonia nitrogen meter specifications

Combination sensor unit modelAM-2000
Sensor model7691*: Ammonium ion chip, 7692*: Potassium ion chip for compensation, 7211: Reference chip
Measurement rangeNH4-N: 0~1000mg/L (display range: 0~2000mg/L)
Temperature: 0~40°C (display range: -10~110°C)
Display resolutionNH4-N: 0.01mg/L: 0.00~10.00mg/L 0.1mg/L: 0.0~100.0mg/L
       1mg/L: 0~1000mg/L
Temperature: 0.1°C
RepeatabilityNH4-N: Larger value between 3%±1 digit of measured value or 0.2mg/L±1 digit  (with standard solution)
Temperature: ±0.3°C
Potassium ion compensationCompensation range: Potassium ion concentration is not more than 10 times
          the ammonium ion concentration and under 1000mg/L
Compensation error: ±20% (measured value)
Additional functionAdjustment with manual analysis (1 point), calibration curve input function (primary expression)
Self-diagnostic functionCorrection error, sensor diagnostic error, transmitter malfunction


Optical dissolved oxygen meter (optional)

Combination sensor unit modelDO-2000
Sensor model5700A: Sensor cap
Measurement rangeDissolved oxygen concentration: 0~20mg/L  Display resolution 0.01mg/L
Saturation degree: 0~200%  Display resolution 0.1%
Temperature: 0~50°C  Display resolution 0.1°C
Self-diagnosticCorrection error, sensor diagnostic error, transmitter malfunction

Transmitter common specifications

Transmission output3 points  DC4~20mA  input-output insulation type  Maximum load resistance 900Ω
Select 3 items from below
Output range 1: Ammonia nitrogen concentration: Configurable within measurement range.
Output range 2: Dissolved oxygen concentration: Configurable within measurement range.
Output range 3: Temperature reading of the ammonia nitrogen meter: Configurable within measurement range of -10~110°C.
Output range 4: Temperature reading of the dissolved oxygen meter: Configurable within measurement range of -10〜110°C.
Operation temperature range-20~55°C (Do not freeze)
PowerAC100~240V  50/60Hz  Consumption power 28VA (max)
StructureOutdoor installation type: Protection level IP65  Installation method: 50A pole or attached to wall
Case: aluminum alloy  Attachment bracket: Hood: SUS304
WeightUnit: Approx. 3.5kg  Hood, attachment bracket: Approx. 1kg
Compliance standardCE Marking, FCC Rules

Detector specifications (Ammonia nitrogen meter)

Sensor unit modelAM-2000
Sample condition0~40°C, pH4.0~8.5
[Na+]: 0~1000 times of [NH4-N]
Measurement depth10m
Wetted materialSUS316, FKM, PVC
WeightApprox. 2.7kg (including 10m cable)

Detector specifications (Optical dissolved oxygen meter)

Sensor unit modelDO-2000
Measurement sample temperature0~50°C
Measurement depth10m
Wetted materialSUS316, NBR, PVC
WeightApprox. 3.0kg (including 10m cable)

*Sensor7691 and 7692 : Store in low temperature (1~30℃)



Instruction transmitter HD-200FL


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