Hand PH Meter

Hand pH meter pH-981 Feature: This pH meter is pen-type model, it has the functions of high precision hold, ATC, waterproof ,precision could be 0.05pH,which suit for lab or outdoor detection.
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Product Details


Pen-type High Accuracy hand PH Meter PH-981

Product name: Pen-type Accuracy Hand PH Meter 981

Model: PH-981

Technical data:

Measuring range: 0.00~14.00pH

Resolution: 0.01pH

Accuracy: ±0.05pH

Calibration: 1point

Working temperature: 0 to 60°C, RH≤95%

Power: 4×1.5v alkaline

Auto shut-off: Approx. 4minutes

Dimension: 168×33×20mm

Weight: 65g



This ph meter is pen-type model, it has the functions of high precision hold, ATC, waterproof ,precision could be 0.05pH,which suit for lab or outdoor detection.



Measuring range









4×1.5v alkaline

Working temperature

0~60°C, R≤H95%

Auto shut-off

Approx. 4 minutes






Backlit screen;Data hold function



1.Remove the protective cap. Do not be alarmed. If white crystals appear around the cap. This is normal with ORP electrodes and they dissolve when rinsed with water.

2.Turn the tester ON by pressing the 'ON/OFF ' button.

3.Immerse into solution up to the max immersion level.

4.Stir gently and wait until the display stabilizes.

5.After use, Turn the tester off by pressing the  ON/OFF button, use the water clean the electrode and replace the protective cap.

Do not use distilled or deionized water for storage purposes.

Large fluctuations in readings could be due to lack of calibration, dry electrode or rundown Batteries.


Attention :  during 2-3 weeks, put electrodes in 3mol/L KCL solution for 12 hours, to make sure the reading within accuracy.


BATTERY REPLACEMENT  When the battery symbol appears on the display, this indicates a low battery and only 1 hour of continuous use remain. though the unit may continue to function ,the accuracy of the unit will be affected beyond the 1 hour twist open the battery compartment lid. remove old batteries and replace with fresh ones noting polarity as show in battery compartment.



1.Remove the protective cap.

2.Unscrew the plastic ring on the top of the electrode .

3.Pull out the electrode and replace it with a new one. make sure the gaskets are in

place before screwing back the ring



These instruments are warranted from all defects in material and manufacturing for a period of one year from the date of purchase.If during this period, the repair or the replacement of parts is required where the damage is not due to negligence or erroneous operation by user, please return the parts to either dealer or our offices, and the repair will be effected free of charge.

Our company:




Our service:





1.How to solve the disputes between Lohand and customers during the after-sales maintenance?

We will be customer-oriented,and make concessions in some principles , we will properly handle the disputes to maximize customer's satisfaction.

2.What after-sales service can be provided by Lohand ?

The after-sales service of Lohand is divided into two parts: technical support and maintenance.

3.What about the transportation?

It depends on your requirement.We can delivery by air to your airport ,or by sea to your seaport ,and we can also delivery to your office address by express courier,and we also accept to co-operate with your ship agent or forwarder.

4.What should I do if I do not know how to use?

Dear customer, please do not worry, manual user will be sent together, you can also contact us with more technological support.

5.When I receive it after pay?

Dear customer, normal models can be delivered with 5-7days, please contact us to check transport time to your address.


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