Hanna HI98194 Multiparameter Waterproof Meter pH EC DO

Hanna HI98194 multiparameter waterproof meter with DO, EC, pH and pressure

The Hanna HI98194 is a rugged handheld multiparameter instrument that reads pH, ORP, conductivity, TDS, resistivity, salinity, seawater sigma, dissolved oxygen, atmospheric pressure and temperature from one multisensor probe. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer.

The model number belongs to the HI9819x family: the HI98194 carries all three probe sensor slots (pH/ORP, galvanic DO and four-ring EC), while the HI98195 drops the DO sensor and the HI98196 drops conductivity. The probe is the matching HI7698194, and the meter only works with the probe version of its own number.

HI98194 technical specifications

How the HI98194 works

The multisensor probe carries up to three replaceable sensors in a single body: a combination pH/ORP sensor (glass bulb, platinum ORP element and double-junction Ag/AgCl reference with gel electrolyte), a galvanic dissolved oxygen sensor with a gas-permeable membrane, and a four-ring conductivity sensor that resists polarisation and surface coating. Oxygen passing through the membrane is reduced at the cathode, and the resulting current gives the concentration; the DO sensor conforms to Standard Methods 4500-O G and EPA 360.1 as stated in the manual.

Conductivity feeds the derived values: TDS, resistivity, salinity and seawater sigma all follow from the EC or salinity calibration. The meter compensates temperature automatically between -5 and 55 °C, and it uses the on-board barometer for DO correction, so an atmospheric pressure calibration should be done when conditions change.

Where HI98194 fits: sensors, accessories and related models

The HI98194 pairs with the HI7698194 probe, available with 4 m or 10 m cable (HI7698194/4 and HI7698194/10). Replacement parts are ordered by sensor code: HI7698194-0 pH, HI7698194-1 pH/ORP, HI7698194-2 DO and HI7698194-3 EC. A probe maintenance kit holds DO electrolyte, membrane caps and O-rings.

Data goes to a PC through USB with the HI9298194 software, and the meter stores up to 45,000 records. Sibling models in the family include the HI98195 and HI98196, shown below.

HI98194 family comparison

Choose the HI98194 when a single deployment must give water chemistry and DO together, for example brine discharge studies or intake monitoring. If dissolved oxygen is not needed, the HI98195 reduces probe cost and maintenance of the DO membrane.

Selection and ordering checklist for HI98194

• Confirm the parameters needed: DO plus EC plus pH/ORP all in one probe points to HI98194
• Choose cable length, 4 m or 10 m, for the deployment depth (rated to 20 m)
• Decide whether spare sensors and the probe maintenance kit should be quoted with the meter
• Check the calibration solutions in use: pH buffers 4.01, 6.86, 7.01, 9.18 and 10.01, and EC standards such as 1413 µS/cm
• Confirm PC software and USB cable requirements for data export

Installation, calibration and maintenance of HI98194

New sensors must be conditioned: pH sensors soak in storage solution (HI70300) for at least half an hour, the ORP element needs surface cleaning, and the galvanic DO sensor is activated before installation per the manual. Calibrate pH at one to three points with automatic buffer recognition, EC at one point with six preset standards, DO at 0 and 100 % or a custom point, and atmospheric pressure at one custom point.

Replace DO membranes on schedule, rinse the probe with deionised water after brackish or oily samples, and store with the guard in place. Do not exceed the 20 m rating and anchor the cable rather than letting it carry load; the cable is rated for 68 kg intermittent pull.

Typical applications of HI98194 in Oman and the GCC

Environmental consultants and plant operators across Oman use this class of meter for wadi, lagoon and coastal surveys, brine and cooling-water discharge compliance, aquaculture ponds and treated sewage effluent. The salinity and seawater sigma outputs are directly relevant to desalination intake and outfall studies on the Gulf of Oman and Arabian Sea coasts, and the IP67/IP68 build copes with spray, dust and sun on field days.

Information to send with an RFQ for HI98194

• Quantity and cable length (4 m or 10 m probe)
• Required spares: pH/ORP, DO and EC sensors, probe maintenance kit
• Calibration solutions needed (pH buffers, EC standards, DO zero solution)
• Delivery location and lead time
• Project or tender reference

Documents and quotation

The instruction manual for the HI98194 is attached on this page for specifications, calibration procedures and maintenance steps.

Send the part number HI98194, the quantity and your delivery location and we will reply with availability and a quotation.