Single Sensor Feedthrough Sealing Assemblies

Our range of high grade sealing assemblies are specifically designed for applications where certainty is required. Depending on the sealant selected, pressures of up to 700 bar and temperatures of -200°C to +870°C can be achieved. These particular assemblies are for use with single sensors or tubes. In applications where multiple sensors or tubes require sealing with one assembly we offer a multiple sensor sealing assembly, which can also be found in this section. A variety of sealants are available and a guide is given below to help you select the most appropriate one for your application.
Sealant types:
Neoprene - (Green) - Temperature range -40°C to +90°C
Has the resilience of natural rubber but with better resistance to oil, petrol, ozone, weather and heat. Excellent physical 'memory for temperature cycling applications, moderate electrical resistivity. Reusable in most cases.
Viton (Brown) - Temperature range -40°C to +225°C
Retains its mechanical properties at high temperatures. Resistant to oils, solvents, fuels and corrosive industrial chemicals. Reusable in most cases.
PTFE (White) - Temperature range -200°C to +250°C
Least permeable to gases. Has a natural lubricity. Resists the adhesion of foreign matter. Reusable in most cases.
Lava (Grey mixture) - Temperature range -200°C to +870°C
Low thermal co-efficient, good electrical resistivity. Crushes to a powder under compression. Slightly porous to light gases and steam. Not recommended for vacuum applications. Not reusable.

Other sealants including Graftite™ are also available. Please contact us if you require assistance in the selection of the correct sealant.
  • For use where probes or other sensors must pass through a pressure or environmental boundary
  • Ideal for use in vacuum applications and are rated to 6.67 x 10-4 Pa (6.67 x 10-6 mbar) for assemblies with Neoprene, Viton or PTFE sealants. Lava sealants are not recommended for use in vacuum applications
  • Our sealant glands maintain the integrity of the seal at the point of feedthrough penetration
  • They employ 'soft sealant' technology so that probes can be adjusted, removed and replaced yet are not deformed during installation
  • Pressure, vacuum and environmental sealing applications are satisfied in many industries including process control and power generation to pharmaceutical, semi conductor fabrication and steel production
  • Overall cost of ownership is often reduced when compared to other sealant techniques through reduction in installation time, downtime and the cost of replacement parts
  • Pressure ratings as shown in the tables below (which have been determined at 20°C with a stainless steel rod as the element. Caution: These sealing glands should be installed by suitably qualified personnel in accordance with relevant health and safety rules and with proper regard to safe working practices
  • Stainless Steel reducing bushes are available as an accessory
  • All assemblies are shipped pre lubricated. A 10ml lubricant pack is available for the relubrication of threads, caps and follower at a later date
  • Assemblies with other thread sizes including BSPP and ISO are available on request
  • Further details and dimensions are available on request
Neoprene Sealant - Temperature Range -40°C to +90°C
Order Code Description 1 - 4 5 - 9 10 - 19 Buy
941-102 1.0mm dia - 1/8" BSPT - 350 bar £13.10 £11.60 £10.50 Add
941-105 1.5mm dia - 1/8" BSPT - 500 bar £13.10 £11.60 £10.50 Add
941-108 3.0mm dia - 1/8" BSPT - 350 bar £13.10 £11.60 £10.50 Add
941-111 3.0mm dia - 1/4" BSPT - 550 bar £21.50 £19.00 £17.20 Add
941-114 6.0mm dia - 1/4" BSPT - 450 bar £21.50 £19.00 £17.20 Add
941-117 6.0mm dia - 1/2" BSPT - 550 bar £36.20 £32.10 £28.90 Add
941-120 8.0mm dia - 1/2" BSPT - 300 bar £36.20 £32.10 £28.90 Add
940-102 1.0mm dia - 1/8" NPT - 350 bar £13.10 £11.60 £10.50 Add
940-105 1.5mm dia - 1/8" NPT - 500 bar £13.10 £11.60 £10.50 Add
940-108 3.0mm dia - 1/8" NPT - 350 bar £13.10 £11.60 £10.50 Add
940-111 3.0mm dia - 1/4" NPT - 550 bar £21.50 £19.00 £17.20 Add
940-114 6.0mm dia - 1/4" NPT - 450 bar £21.50 £19.00 £17.20 Add
940-117 6.0mm dia - 1/2" NPT - 550 bar £36.20 £32.10 £28.90 Add
940-120 8.0mm dia - 1/2" NPT - 300 bar £36.20 £32.10 £28.90 Add
940-930 KF40-150 Attached to Fitting £29.80 £27.40 £26.20 Add
940-935 KF25-100 Attached to Fitting £29.80 £27.40 £26.20 Add
941-910 Reducing Bush 1/4” BSPT (M) to 1/8” BSPP (F) £4.40 £3.95 £3.60 Add
941-915 Reducing Bush 1/2” BSPT (M) to 1/8” BSPP (F) £6.55 £5.90 £5.30 Add
941-920 Reducing Bush 1/2” BSPT (M) to 1/4” BSPP (F) £8.50 £7.65 £6.90 Add
941-925 Reducing Bush 3/4” BSPT (M) to 1/2” BSPP (F) £11.70 £10.50 £9.50 Add
940-910 Reducing Bush 1/4” NPT (M) to 1/8” NPT (F) £4.40 £3.95 £3.60 Add
940-915 Reducing Bush 1/2” NPT (M) to 1/8” NPT (F) £6.55 £5.90 £5.30 Add
940-920 Reducing Bush 1/2” NPT (M) to 1/4” NPT (F) £8.50 £7.65 £6.90 Add
940-925 Reducing Bush 3/4” NPT (M) to 1/2” NPT (F) £11.70 £10.50 £9.50 Add
941-950 Adaptor Bush 1/8” BSPT (M) to 1/4” BSPP (F) £4.95 £4.45 £4.05 Add
941-955 Adaptor Bush 1/8" BSPT (M) to 1/2" BSPP (F) £7.35 £6.60 £6.00 Add
941-960 Adaptor Bush 1/4" BSPT (M) to 1/2" BSPP (F) £9.55 £8.60 £7.80 Add
941-965 Adaptor Bush 1/2" BSPT (M) to 3/4" BSPP (F) £13.10 £11.80 £10.75 Add
940-950 Adaptor Bush 1/8” NPT (M) to 1/4” NPT (F) £4.95 £4.45 £4.05 Add
940-955 Adaptor Bush 1/8" NPT (M) to 1/2" NPT (F) £7.35 £6.60 £6.00 Add
940-960 Adaptor Bush 1/4" NPT (M) to 1/2" NPT (F) £9.55 £8.60 £7.80 Add
940-965 Adaptor Bush 1/2" NPT (M) to 3/4" NPT (F) £13.10 £11.80 £10.75 Add
940-900 10ml Lubricant Pack £3.30 £2.95 £2.70 Add
Viton Sealant - Temperature Range -40°C to +225°C
Order Code Description 1 - 4 5 - 9 10 - 19 Buy
941-140 1.0mm dia - 1/8" BSPT - 350 bar £13.10 £11.60 £10.50 Add
941-143 1.5mm dia - 1/8" BSPT - 500 bar £13.10 £11.60 £10.50 Add
941-146 3.0mm dia - 1/8" BSPT - 550 bar £13.10 £11.60 £10.50 Add
941-149 3.0mm dia - 1/4" BSPT - 700 bar £21.50 £21.50 £21.50 Add
941-152 6.0mm dia - 1/4" BSPT - 700 bar £21.50 £21.50 £21.50 Add
941-155 6.0mm dia - 1/2" BSPT - 550 bar £36.20 £36.20 £36.20 Add
941-158 8.0mm dia - 1/2" BSPT - 450 bar £36.20 £36.20 £36.20 Add
941-161 12.7mm (1/2") dia - 3/4" BSPT - 200 bar £71.50 £63.30 £57.20 Add
941-164 15.9mm (3/4") dia - 3/4" BSPT - 150 bar £71.50 £63.30 £57.20 Add
940-140 1.0mm dia - 1/8" NPT - 350 bar £13.10 £11.60 £10.50 Add
940-143 1.5mm dia - 1/8" NPT - 500 bar £13.10 £11.60 £10.50 Add
940-146 3.0mm dia - 1/8" NPT - 550 bar £13.10 £11.60 £10.50 Add
940-149 3.0mm dia - 1/4" NPT - 700 bar £21.50 £21.50 £21.50 Add
940-152 6.0mm dia - 1/4" NPT - 700 bar £21.50 £21.50 £21.50 Add
940-155 6.0mm dia - 1/2" NPT - 550 bar £36.20 £36.20 £36.20 Add
940-158 8.0mm dia - 1/2" NPT - 450 bar £36.20 £36.20 £36.20 Add
940-161 12.7mm (1/2") dia - 3/4" NPT - 200 bar £71.50 £63.30 £57.20 Add
940-164 15.9mm (5/8") dia - 3/4" NPT - 150 bar £71.50 £63.30 £57.20 Add
940-930 KF40-150 Attached to Fitting £29.80 £27.40 £26.20 Add
940-935 KF25-100 Attached to Fitting £29.80 £27.40 £26.20 Add
941-910 Reducing Bush 1/4” BSPT (M) to 1/8” BSPP (F) £4.40 £3.95 £3.60 Add
941-915 Reducing Bush 1/2” BSPT (M) to 1/8” BSPP (F) £6.55 £5.90 £5.30 Add
941-920 Reducing Bush 1/2” BSPT (M) to 1/4” BSPP (F) £8.50 £7.65 £6.90 Add
941-925 Reducing Bush 3/4” BSPT (M) to 1/2” BSPP (F) £11.70 £10.50 £9.50 Add
940-910 Reducing Bush 1/4” NPT (M) to 1/8” NPT (F) £4.40 £3.95 £3.60 Add
940-915 Reducing Bush 1/2” NPT (M) to 1/8” NPT (F) £6.55 £5.90 £5.30 Add
940-920 Reducing Bush 1/2” NPT (M) to 1/4” NPT (F) £8.50 £7.65 £6.90 Add
940-925 Reducing Bush 3/4” NPT (M) to 1/2” NPT (F) £11.70 £10.50 £9.50 Add
941-950 Adaptor Bush 1/8” BSPT (M) to 1/4” BSPP (F) £4.95 £4.45 £4.05 Add
941-955 Adaptor Bush 1/8" BSPT (M) to 1/2" BSPP (F) £7.35 £6.60 £6.00 Add
941-960 Adaptor Bush 1/4" BSPT (M) to 1/2" BSPP (F) £9.55 £8.60 £7.80 Add
941-965 Adaptor Bush 1/2" BSPT (M) to 3/4" BSPP (F) £13.10 £11.80 £10.75 Add
940-950 Adaptor Bush 1/8” NPT (M) to 1/4” NPT (F) £4.95 £4.45 £4.05 Add
940-955 Adaptor Bush 1/8" NPT (M) to 1/2" NPT (F) £7.35 £6.60 £6.00 Add
940-960 Adaptor Bush 1/4" NPT (M) to 1/2" NPT (F) £9.55 £8.60 £7.80 Add
940-965 Adaptor Bush 1/2" NPT (M) to 3/4" NPT (F) £13.10 £11.80 £10.75 Add
940-900 10ml Lubricant Pack £3.30 £2.95 £2.70 Add
PTFE Sealant - Temperature Range -200°C to +250°C
Order Code Description 1 - 4 5 - 9 10 - 19 Buy
941-184 1.0mm dia - 1/16" BSPT - 200 bar £30.80 £27.30 £24.70 Add
941-187 1.0mm dia - 1/8" BSPT - 200 bar £13.10 £11.60 £10.50 Add
941-190 1.5mm dia - 1/16" BSPT - 150 bar £30.80 £27.30 £24.70 Add
941-193 1.5mm dia - 1/8" BSPT - 150 bar £13.10 £11.60 £10.50 Add
941-196 3.0mm dia - 1/8" BSPT - 100 bar £13.10 £11.60 £10.50 Add
941-199 3.0mm dia - 1/4" BSPT - 250 bar £21.50 £19.00 £17.20 Add
941-202 6.0mm dia - 1/4" BSPT - 150 bar £21.50 £19.00 £17.20 Add
941-205 6.0mm dia - 1/2" BSPT - 200 bar £36.20 £32.10 £28.90 Add
941-208 8.0mm dia - 1/2" BSPT - 150 bar £36.20 £32.10 £28.90 Add
941-211 12.7mm (1/2") dia - 3/4" BSPT - 75 bar £71.50 £63.30 £57.20 Add
941-214 15.9mm (5/8") dia - 3/4" BSPT - 75 bar £71.50 £63.30 £57.20 Add
941-217 21.3mm dia (1/2" pipe) - 1" BSPT - 75 bar £218.50 £193.40 £174.70 Add
940-184 1.0mm dia - 1/16" NPT - 200 bar £30.80 £27.30 £24.70 Add
940-187 1.0mm dia - 1/8" NPT - 200 bar £13.10 £11.60 £10.50 Add
940-190 1.5mm dia - 1/16" NPT - 150 bar £30.80 £27.30 £24.70 Add
940-193 1.5mm dia - 1/8" NPT - 150 bar £13.10 £11.60 £10.50 Add
940-196 3.0mm dia - 1/8" NPT - 100 bar £13.10 £11.60 £10.50 Add
940-199 3.0mm dia - 1/4" NPT - 250 bar £21.50 £19.00 £17.20 Add
940-202 6.0mm dia - 1/4" NPT - 150 bar £21.50 £19.00 £17.20 Add
940-205 6.0mm dia - 1/2" NPT - 200 bar £36.20 £32.10 £28.90 Add
940-208 8.0mm dia - 1/2" NPT - 150 bar £36.20 £32.10 £28.90 Add
940-211 12.7mm (1/2") dia - 3/4" NPT - 75 bar £71.50 £63.30 £57.20 Add
940-214 15.9mm (5/8") dia - 3/4" NPT - 75 bar £71.50 £63.30 £57.20 Add
940-217 21.3mm dia (1/2" pipe) - 1" NPT - 75 bar £218.50 £193.40 £174.70 Add
940-930 KF40-150 Attached to Fitting £29.80 £27.40 £26.20 Add
940-935 KF25-100 Attached to Fitting £29.80 £27.40 £26.20 Add
941-910 Reducing Bush 1/4” BSPT (M) to 1/8” BSPP (F) £4.40 £3.95 £3.60 Add
941-915 Reducing Bush 1/2” BSPT (M) to 1/8” BSPP (F) £6.55 £5.90 £5.30 Add
941-920 Reducing Bush 1/2” BSPT (M) to 1/4” BSPP (F) £8.50 £7.65 £6.90 Add
941-925 Reducing Bush 3/4” BSPT (M) to 1/2” BSPP (F) £11.70 £10.50 £9.50 Add
940-910 Reducing Bush 1/4” NPT (M) to 1/8” NPT (F) £4.40 £3.95 £3.60 Add
940-915 Reducing Bush 1/2” NPT (M) to 1/8” NPT (F) £6.55 £5.90 £5.30 Add
940-920 Reducing Bush 1/2” NPT (M) to 1/4” NPT (F) £8.50 £7.65 £6.90 Add
940-925 Reducing Bush 3/4” NPT (M) to 1/2” NPT (F) £11.70 £10.50 £9.50 Add
941-950 Adaptor Bush 1/8” BSPT (M) to 1/4” BSPP (F) £4.95 £4.45 £4.05 Add
941-955 Adaptor Bush 1/8" BSPT (M) to 1/2" BSPP (F) £7.35 £6.60 £6.00 Add
941-960 Adaptor Bush 1/4" BSPT (M) to 1/2" BSPP (F) £9.55 £8.60 £7.80 Add
941-965 Adaptor Bush 1/2" BSPT (M) to 3/4" BSPP (F) £13.10 £11.80 £10.75 Add
940-950 Adaptor Bush 1/8” NPT (M) to 1/4” NPT (F) £4.95 £4.45 £4.05 Add
940-955 Adaptor Bush 1/8" NPT (M) to 1/2" NPT (F) £7.35 £6.60 £6.00 Add
940-960 Adaptor Bush 1/4" NPT (M) to 1/2" NPT (F) £9.55 £8.60 £7.80 Add
940-965 Adaptor Bush 1/2" NPT (M) to 3/4" NPT (F) £13.10 £11.80 £10.75 Add
940-900 10ml Lubricant Pack £3.30 £2.95 £2.70 Add
Lava Sealant - Temperature Range -200°C to +870°C
Order Code Description 1 - 4 5 - 9 10 - 19 Buy
941-242 1.5mm - 1/8" BSPT - 550 bar £13.10 £11.60 £10.50 Add
941-245 3.0mm - 1/8" BSPT - 450 bar £13.10 £11.60 £10.50 Add
941-248 3.0mm - 1/4" BSPT - 700 bar £21.50 £19.00 £17.20 Add
941-251 6.0mm - 1/4" BSPT - 700 bar £21.50 £19.00 £17.20 Add
941-254 6.0mm - 1/2" BSPT - 700 bar £36.20 £32.10 £28.90 Add
941-257 8.0mm - 1/2" BSPT - 700 bar £36.20 £32.10 £28.90 Add
941-260 12.7mm (1/2") - 3/4" BSPT - 400 bar £71.50 £63.30 £57.20 Add
941-263 15.9mm (5/8") - 3/4" BSPT - 300 bar £71.50 £63.30 £57.20 Add
940-242 1.5mm - 1/8" NPT - 550 bar £13.10 £11.60 £10.50 Add
940-245 3.0mm - 1/8" NPT - 450 bar £13.10 £11.60 £10.50 Add
940-248 3.0mm - 1/4" NPT - 700 bar £21.50 £19.00 £17.20 Add
940-251 6.0mm - 1/4" NPT - 700 bar £21.50 £19.00 £17.20 Add
940-254 6.0mm - 1/2" NPT - 700 bar £36.20 £32.10 £28.90 Add
940-257 8.0mm - 1/2" NPT - 700 bar £36.20 £32.10 £28.90 Add
940-260 12.7mm (1/2") - 3/4" NPT - 400 bar £71.50 £63.30 £57.20 Add
940-263 15.9mm (5/8") - 3/4" NPT - 300 bar £71.50 £63.30 £57.20 Add
940-930 KF40-150 Attached to Fitting £29.80 £27.40 £26.20 Add
940-935 KF25-100 Attached to Fitting £29.80 £27.40 £26.20 Add
941-910 Reducing Bush 1/4” BSPT (M) to 1/8” BSPP (F) £4.40 £3.95 £3.60 Add
941-915 Reducing Bush 1/2” BSPT (M) to 1/8” BSPP (F) £6.55 £5.90 £5.30 Add
941-920 Reducing Bush 1/2” BSPT (M) to 1/4” BSPP (F) £8.50 £7.65 £6.90 Add
941-925 Reducing Bush 3/4” BSPT (M) to 1/2” BSPP (F) £11.70 £10.50 £9.50 Add
940-910 Reducing Bush 1/4” NPT (M) to 1/8” NPT (F) £4.40 £3.95 £3.60 Add
940-915 Reducing Bush 1/2” NPT (M) to 1/8” NPT (F) £6.55 £5.90 £5.30 Add
940-920 Reducing Bush 1/2” NPT (M) to 1/4” NPT (F) £8.50 £7.65 £6.90 Add
940-925 Reducing Bush 3/4” NPT (M) to 1/2” NPT (F) £11.70 £10.50 £9.50 Add
941-950 Adaptor Bush 1/8” BSPT (M) to 1/4” BSPP (F) £4.95 £4.45 £4.05 Add
941-955 Adaptor Bush 1/8" BSPT (M) to 1/2" BSPP (F) £7.35 £6.60 £6.00 Add
941-960 Adaptor Bush 1/4" BSPT (M) to 1/2" BSPP (F) £9.55 £8.60 £7.80 Add
941-965 Adaptor Bush 1/2" BSPT (M) to 3/4" BSPP (F) £13.10 £11.80 £10.75 Add
940-950 Adaptor Bush 1/8” NPT (M) to 1/4” NPT (F) £4.95 £4.45 £4.05 Add
940-955 Adaptor Bush 1/8" NPT (M) to 1/2" NPT (F) £7.35 £6.60 £6.00 Add
940-960 Adaptor Bush 1/4" NPT (M) to 1/2" NPT (F) £9.55 £8.60 £7.80 Add
940-965 Adaptor Bush 1/2" NPT (M) to 3/4" NPT (F) £13.10 £11.80 £10.75 Add
940-900 10ml Lubricant Pack £3.30 £2.95 £2.70 Add