HYDROLAB HL7 - Ammonium;Ammonia Sensor (007255)

Section 2 Ammonium/Ammonia sensor (007255)
2.1 Specifications
Specifications are subject to change without notice.
Specification Details
Range 0 to 250 mg/L-N
Accuracy ± 10% or ± 2 mg/L-N (the larger value)
Resolution 0.01 mg/L-N
Parameters NH
4
+
, NH
3
Tot (total ammonia nitrate), NH
3
or sensor mV
Interferences Sodium interferes with measurements at 1000 µS/cm and higher
Deployment life of sensor cartridge 3 to 4 months
Life
1
of sensor cartridge 6 months
Maximum depth 15 m (49 ft)
Operating temperature 0 to 40 °C (32 to 104 °F)
2.2 Product overview
The ammonium/ammonia sensor (007255) is gray. Refer to Figure 1.
There is a replaceable sensor cartridge installed in the sensor. Refer to Specifications on page 5 for
the deployment life of the sensor cartridge.
For best results, use the sensor in waters that are pH 4 to 10. Refer to Specifications on page 5 for
measurement interferences.
The sensor cartridge has a depth limit of 15 meters (49 feet). Remove the sensor cartridge and install
the sensor cap before the sonde is deployed deeper than 15 m (49 ft) to prevent damage to the
sensor cartridge. Refer to the illustrated steps in Figure 2.
To extend the life of the sensor cartridge, remove the sensor cartridge and install the sensor cap
when the sensor is not in use. Refer to the illustrated steps in Figure 2.
Note: At pH levels of 6 or less, water contains ammonium (NH
4+
) and no ammonia. At pH 12 and higher, water
contains ammonia (NH
3
) and no ammonium. Between pH 6 and pH 12, water contains a mix of ammonium and
ammonia.
Figure 1 Nitrate sensor
1 Sensor 3 Sensor cap
2 Sensor cartridge 4 Glass vial for sensor cartridge storage
1
Deployment life plus the storage life
English 5