A holding tank is easy to forget until it overflows. By then the wastewater contractor is hours away and a PUB penalty is possible. A reliable tank monitoring system warns you while there is still time to act.

In this guide, we explain how an SMS alert system in Singapore works, who needs one, and what to check before you buy.

What Is a Holding Tank SMS Alert System?

A holding or ejector tank collects wastewater on sites without a direct sewer connection, or where the system needs a temporary buffer. It must be emptied by a wastewater removal contractor before it fills up.

A holding tank SMS alert system monitors the level in that tank. When the water gets high, it sends a text message to the people who need to know. The goal is to arrange collection in time, prevent overflow, and avoid fines from the Public Utilities Board (PUB).

Think of it as a water tank alert system for the tanks people usually ignore.

Why Manual Checking Is Not Enough

• Tanks fill unpredictably. Site activity, weather and workforce size all change the fill rate.
• Nobody watches at night or on weekends. An overflow does not wait for working hours.
• Site teams are busy. Manual inspections get skipped.
• The cost of a miss is high. Fines and cleanup cost far more than an alert system.

Automated water tank monitoring in Singapore replaces "someone should check" with a message that arrives on its own.

How a Smart Tank Monitoring System Works

Our smart tank monitoring system has two main parts.

1. Float switches at two levels. Two float switches (NOLTA brand, made in Germany) sense the high level and the overflow level.

2. A control panel with indicators. The panel sits in a double-door metal box. It shows high level, overflow level and power status, and has a button to mute the alarm buzzer.

When the water reaches the high level, an SMS goes out. If it keeps rising to the overflow level, a second and more urgent SMS follows.

Who Receives the SMS Alerts?

• High level: up to 5 local Singapore mobile numbers
• Overflow level: the same 5 numbers plus 1 PUB officer's number

Your site manager, safety officer, project engineer and facilities team can all be notified. If the tank reaches overflow, PUB is informed too.

Easy to Configure and Move Between Sites

You can update these details yourself by sending an SMS in a specific format:

• Tank capacity
• Site address
• Tank number
• Project reference number

Main contractors can move the system from one project to the next. The only ongoing charge is a nominal yearly SIM card renewal fee.

Who Needs a Holding Tank Monitoring System?

• Main contractors with temporary holding tanks on construction sites
• Occupiers with septic or ejector tanks who must arrange timely wastewater collection
• Project teams that need to show they are monitoring tank levels

If your site also uses an ejector pump system, a level alert adds an extra layer of protection.

Delivery and Warranty

After we receive your approved purchase order, we deliver and install the whole system within 2 working days. It comes with a one-year warranty on the system and its components, subject to terms and conditions.

What to Look For Before You Buy

1. Two alert levels: a high-level warning and a separate overflow alarm
2. Multiple recipients: one phone number is a single point of failure
3. PUB officer notification: important for compliance
4. Quality sensors: reliable floats last longer in harsh tank conditions
5. A local supplier: fast installation and support matter when a tank is nearly full
6. Reconfigurable settings: change site details without calling a technician

Related Services

Waves Fluid Engineering also provides tank installation, tank repair and maintenance, tank washing, pump maintenance and a leak detection system.

Frequently Asked Questions

What is a tank monitoring system?
It is a system that tracks the water level in a tank and alerts you when it reaches a set level. Ours uses float switches and a control panel that sends SMS alerts.

How many people can receive the SMS alerts?
Up to 5 local Singapore numbers receive the high-level alert. At overflow level, the same 5 numbers plus 1 PUB officer's number receive the alert.

How fast can the system be installed?
Within 2 working days of receiving an approved purchase order.

Is there a warranty?
Yes, a one-year warranty on the system and its components, subject to terms and conditions.

Are there any recurring charges?
A nominal yearly SIM card renewal fee applies.

Get a Quotation

Need a tank monitoring system in Singapore? Contact Waves Fluid Engineering Pte Ltd for a quote and consultation.

📞 +65 9487 0446
📧 sales@wavesfluid.com.sg
🔗 Request a quotation