Flowserve KS 90-1 Conductivity Controller and Limiter
Shop the Flowserve KS 90-1, a TÜV-certified conductivity controller by Gestra. Ideal for automatic boiler blowdown and TDS control to improve efficiency and safety.
Flowserve KS 90-1 Conductivity Controller and Limiter
The Flowserve KS 90-1, manufactured by Gestra, is a high-performance digital conductivity controller and limiter designed for precise monitoring and control of industrial boiler systems. It automates the continuous blowdown process by constantly measuring the boiler water’s conductivity (TDS level), ensuring optimal operational efficiency, reduced energy consumption, and prevention of scale buildup. Featuring a clear, backlit LCD display and a user-friendly membrane keypad, the KS 90-1 allows for easy configuration and at-a-glance monitoring of operational status via four LED indicators. This TÜV-certified unit meets stringent safety standards for unattended boiler operation, making it a reliable and essential component for maintaining boiler health and performance.
Technical Specifications:
- Function: Digital conductivity controller and limiter for continuous boiler blowdown
- Supply Voltage: 24 V DC, 115 V AC, or 230 V AC (model dependent)
- Measuring Range: 0.5 – 10,000 µS/cm (configurable)
- Outputs: 1 x Analogue output (0/4-20 mA), 2 x Relay outputs (for controller and limiter)
- Display: 2-line backlit LCD with 4 LED status indicators
- Certifications: TÜV-tested according to EN 12952-11 and EN 12953-9 for unattended operation
- Enclosure Protection: Front IP40, Housing IP20

| Brand | Flowserve |
|---|---|
| Model | KS 90-1 |
GENERAL DELIVERY INFORMATION
Thank you for visiting and shopping at www.zxanhyd.com. Following are the terms and conditions for the Shipping Policy for ZXAN Hydraulic.
Orders will be processed and shipping during standard working hours (0830 – 1730 BST) Monday to Friday (excluding Bank Holidays)., are processed and despatched on the same business day. If we are experiencing a high volume of orders, shipments may be delayed by 1-2 Days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email or telephone.
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We use some of the top carrier companies in the world, although you can use your own carrier to collect the order. All deliveries require a signature on delivery. Below are our main carrier companies.

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RETURNS POLICY
Our Return & Refund Policy provides detailed information about options and procedures for returning your order.

