What products do I need to get started calibrating my Hach GS1440 or GS2440EX?

You need the Calibration kit incl. calibration gas (1000 ppm H₂S) to get started. The kit contains all the parts needed to calibrate liquid-phase H₂S sensors (e.g. the Hach GS1440 or GS2440EX); a calibration cap, a regulator, a hose, and a calibration gas cylinder with an approximate capacity for 30 calibrations. We also supply additional calibration gas, that is fully compatible with the calibration kit.

How is the purchase process?

1. Add the relevant product(s) to the cart and proceed to checkout.
2. Fill out shipping and billing information and place an order using credit card payment or bank transfer (prepayment)
3. For orders via credit card: We will review the order, capture the payment and ship the goods.
   For orders via prepayment: We will review the order and send you a proforma invoice with payment details. Once the funds appear in our account, we will then ship the goods. 

How can I pay?

CertGas accepts secure prepayment from major credit cards via Stripe as well as direct bank transfers.

Do you deliver to my location?

We ship to most countries. If you cannot select your country at checkout, please contact us.

How long will it take for my order to arrive?

We provide fast shipping via UPS. Delivery times depend on your location.

What is the shipping rate?

Our calibration gas products are classified and shipped as “Dangerous goods” deliveries at a flat rate of $150/€150 regardless of the order quantity.

Who can buy the gas?

We only sell to registered companies. We will cancel your order if you do not provide company information at checkout. 

Are prices with or without VAT?

For orders within the European Economic Area (EAA), orders are Zero-rated in accordance with the rules for intra-EU supply of goods/services. A valid VAT number must be provided at checkout.
For orders in Denmark, Danish sales tax (moms) of 25% is included.
For orders outside of the EAA, prices are exclusive of VAT, import duties, and sales taxes.
We only sell to registered companies, not individuals.

Where can I download the latest SDS?

Right here.

What are your terms & conditions?

Terms & Conditions of Sale and Delivery