• ✔ Ready to be shipped
mc btm2 Metal Cutting Dipslides
  • mc btm2 Metal Cutting Dipslides
  • Metal Cutting Dipslides
  • TTC Red Spot Dye

Metal Cutting Fluid Dipslides (Box of 10)

Metal Cutting Fluid Dipslides (MCBTM2™) used to comply with HSE testing regulations.

Each dipslide box includes 10 dipslide tests. 


By buying this product you can collect up to 11 points


MCBTM2 Volume discounts

Quantity Price You Save
51 £11.33 Up to £32.14
101 £10.89 Up to £107.75
251 £10.26 Up to £427.48
501 £9.70 Up to £1,131.88
1000 £7.94 Up to £4,024.54

Product specification

Front Agar Type Nutrient TTC
Front Agar Colour Straw
Front Agar Growth Total Count (TTC / Red Spot)
Rear Agar Type Malt Extract
Rear Agar Colour Brown
Rear Agar Growth Yeasts & Moulds
Shelf Life 6 to 8 months
Certification ISO 9001
Suggested Incubation Times 24 - 120 Hours
Suggested Incubation Temp 30°C

Metal cutting / lathe cutting fluid microbiological testing is very important.

To avoid contact with contaminated fluids, you may adopt some of the following precautions:

  • wear protective clothing,
  • use effective ventilation
  • proper use of biocides
  • replace fluids regularly

In addition to the above, frequent bacteria testing of metalworking fluids is essential for a healthy working environment. Bacterial contamination of the fluid makes it degrade after a certain amount of use and high bacteria levels will make it unsafe for use. Skin and respiratory irritation / infection are a risk here and contaminated fluids can cause breathing problems such as asthma as well as dermatitis. Eye, nose and throat irritation can also occur.

In addition to affecting human health, high bacteria levels in metalworking fluids can make it more corrosive to metals and machinery and can cause damage to both.
Weekly dipslide tests are advised by the Health and Safety Executive. For further reading on this, you can visit their site:


Each box contains 10 dipslides. The price shown is for 1 box. 

How to use BTM2 dipslides to test metalworking fluids

Dip the slide into the metal cutting fluid (MWF).

Dip slide into fluid

Fully submerse the dipslide (so all the agar is covered) into your cutting fluid sample for 10 seconds. After which, remove the slide and allow the fluid to drain off before returning it to the tube.

Place the dipslide into the incubator.

Place dipslide into the incubator

Place the dipslide into your incubator and inbucate for 24-120 hours (see instruction sheet for exact times).

Compare the dipslide results with the comparison chart.

Review Results

Remove the dip slide from the incubator and compare the results with the comparison chart provided.

'microbiological + dipslides'

Our MCBTM2™ dipslides are ideal for this purpose. These slides test for aerobic bacteria, fungi, yeasts and moulds. This metal cutting fluid dipslide tests for yeasts / moulds on one side and total count (aerobic / bacteria microbes) on the other.

Flexable paddle

Flexible Paddle

Each dipslide features a virtually unbreakable and flexable paddle allowing for even, full surface testing

Easy run off design

Easy run Off Design

Due to the design of the dipslide, fluids will drain off quickly during testing.

Recessed Handle

Recessed Handle

Each slide has a handle built into the lid that is recessed to help keep your finders dry during testing

Side Indicator

Side Indicator

One side of the slide will have a circle indicator so you know which side was used for testung which contaminant.

Dual sided paddle

Dual Sided

Each dipslide is dual sided to allow multiple contamination testing with one test

Thick reliable Agar

Thick Reliable Agar

Each agar is thick (approx 4mm) and raised above the dipslide to allow for easy surface testing.

Why not team these slides with one of our Gnat incubators so that you are fully set up to view and interpret your results?

Reading the results

Nutrient Side

Level of infection in liquids







Approx colonies per agar







HSE.gov.uk advice

Good control. Bacteria are being maintained at low levels. No further action is required.

Reasonable control. Review control measures to ensure levels of bacteria remain under control. Risk assessment should specify action to be taken. Biocides and or cleaning may be indicated. If biocides are used, expert advice should be obtained, and the concentration of biocides should be monitored

Poor control. Immediate action should be taken in line with the risk assessment. Normally at very high levels draining and cleaning, should take place.

Example Image

102.jpg 103.jpg 104.jpg 105.jpg 106.jpg 107.jpg

Level of infection on surfaces

0.4 2.5 12 40 100 250

Malt Extract Side

Level of yeasts in liquids







Approx yeasts colonies per agar







Example Image

Yeast dipslide growth Yeast dipslide growth Yeast dipslide growth Yeast dipslide growth Yeast dipslide growth Yeast dipslide growth

Level of yeasts on surfaces







Malt Extract Side

Level of moulds




Example Image

Light mould growth on slide Medium mould growth on slide heavy mould growth on slide

Related UK & International Guidelines / Regulations

MW5 ('Managing sumps and bacterial contamination') -

Control of Substances Hazardous to Health Regulations as regulated by HSE 

ASTM E2693 -

Standard Practice for Prevention of Dermatitis in the Wet Metal Removal Fluid Environment

ASTM E2657 - 

Standard Practice for Determination of Endotoxin Concentrations in Water-Miscible Metalworking Fluids

ASTM E2275 -  

Standard Practice for Evaluating Water-Miscible Metalworking Fluid Bioresistance and Antimicrobial Pesticide Performance

ASTM E2169 -  

Standard Practice for Selecting Antimicrobial Pesticides for Use in Water-Miscible Metalworking Fluids

Customer Questions


What is the shelf life of the metal cutting fluid dipslides?


All dip slides have a minimum of 6 months shelf life (maximum of 8 months).
If you have any further questions, please let us know.


Do you have these currently available? If so can you advise on the lead time?


Yes, these are in stock and available for dispatch. Delivery varies depending on location but dispatch time is usually same day (if ordered during business hours).


Does it need to be paced into an incubator or can it simply set out in ambient temperatures?


Hi, we recommend the use of an incubator as this gives a constant temperature of 30 degrees c and will give more accurate results.


On HSE's website it says to search for 'microbiological + dipslides'. Are these dipslides suitable for metal fluid testing?


Yes, these microbiological dipslides are the tests that we recommend for this application. They test metal cutting / working fluids for bacteria as well as yeasts and moulds and are popular with all of our customers that work in this industry.
As you can see by our chart on this page, we have added HSE guidelines to help you assess how to proceed once you have evaluated your level of contamination.


I am testing 2 machines using the same brand of cutting fluid and for the second time the readings are 1st machine-lots of mould and no bacteria 2nd machine-lots of bacteria and no mould. what is the reason to this if any. please advise.


Due to the amount of factors involved in contamination, it is likely that each machine will have different microbiological contaminants.

Each machine can become contaminated through many different means e..g mould spores can come in through a window/door or on someones clothes (and in turn enter the fluid).
Bacteria can be introduced through hands, hair, skin, sweat, saliva, raw materials such as water or tools and this can be made worse by differing fluid quality e.g pH levels.

It is definitely not unusual for each machine to have a different level / type of contamination.


I have just ordered an orion incubator & MCBTM2™ dip slides - does a comparison chart come with either of these for comparing the test results? (as shown in step 4 of the instructions above)


Thank you for your order. The dipslides come with a simple comparison chart inside each box. However, the chart on 'step 4' can be downloaded from https://dip-slides.com/content/7-dipslide-comparison-charts. There are also examples of the MCBTM2™ dipslides after incubation (on https://dip-slides.com/home/31-metal-cutting-fluid-dipslides-box-of-10.html) under the "READING THE RESULTS" section.


Do you have a similar table to the bacterial content for the mould growth - especial with the HSE advice on acceptable levels as I am unable to find reference to mould growth on the HSE metal working fluid pages


Hello, As far as we are aware there are no specific guidelines regarding the yeast & mould count. However, we have contacted the HSE to see if we can get further clarification on this. We would also recommend that you discuss this with any health and safety liaisons that you have. This being said, if your fluid shows a high yeast / mould count, we would suggest that action is required.


Which industrial fluids / applications are these dipslides suitable for testing?


These dipslides are ideal for testing cutting fluids, oils, lubricants and coolants. Ideal applications include metalworking, metal cutting, machining, Grinding, CNC.


Specific References


52 Week Record Sheet JPG

Record 52 weeks worth of bacteria / Yeasts / Moulds and pH tests in JPG format (quicker to open)

Download (1.11M)

Malt Extract Comparison Chart

Malt Extract comparison chart in JPG format

Download (1.77M)

52 Week Record Sheet PDF

Record 52 weeks worth of bacteria / Yeasts / Moulds and pH tests in PDF format (may take a while to open fully)

Download (6.7M)


MSDS Sheet for Dipslides

Download (278.29k)

Nutrient Comparison Chart

Nutrient comparison chart in JPG format

Download (1.62M)

Metal Cutting Datasheet

Metal Cutting Dipslide Datasheet (PDF)

Download (1.75M)